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The Best Underhood Light of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Underhood Light of 2023. Check our ranking below.

2,868 (random number) Reviews Scanned

SaleRank No. #1

NEIKO 40447A Rechargeable Cordless Underhood Work Light, 202 SMD LED Light Bar with Max 1,200 Lumens, Li-Ion Battery, and 2 Brightness Modes

WORK LIGHT FOR MECHANICS: The NEIKO 40447A cordless underhood work light is an amazing illuminator for auto mechanics! This cordless mechanic light will help you complete car, truck, and other vehicle repair jobs with its LED and wireless features!
BRIGHTNESS POWER: This mechanic light provides up to 1,200 lumens of light under the hood of your car or vehicle. It is powered by 202 individual bulbs of next-generation SMD LED technology and can light the entire engine compartment.
HEAVY-DUTY LIGHT: Our underhood light has impact-resistant polycarbonate housing covering the light and lens to ensure maximum durability. This LED work light provides 3 hours of run time on high mode and 6 hours on low mode.
LONG REACH: Our long LED bar contains a light-holding tube that ranges from 47" to 76" to fit any hood size. This tool has 2 magnet hooks and foam-cushioned protective end hooks to prevent scratching and other damage to your vehicle’s finish.
RECHARGEABLE WORK LIGHT: With an 8,000-mAh large-capacity rechargeable Li-ion battery, this LED work light provides great illumination at any time. It comes with a UL/cUL-certified charger and overcharge protection.

Rank No. #2

ATD Tools atd-80357 2000 Lumen LED Corded/Cordless Underhood Light with 25' Removable Cord, 1 Pack,red / black / LED,Large

Run time: up to 1.6-Hours (high), up to 3-hours (low)
Package Dimensions: 16.002 L x 148.082 H x 21.082 W (centimeters)
Package Weight : 3.606 kilograms
Country of Origin : China

Rank No. #3

Clip Light Manufacturing 2125-20 Underhood Light,Black

5 yr. warranty on material and workmanship
This product meets customer requirement
Product is manufactured in China
Model number: 2125-20

Rank No. #4

Astro Tools 151SL 1510 Lumen Slim Aluminum Rechargeable Underhood Light

Slim, sleek and sturdy all aluminum structure adjusts from 45.5" - 82" in length with independent swivel tension hooks that allow you to point the light where you need it
500-1510 lumens of light output and everywhere in between with the power button dimming function
2.5-6hr run time with charge level indicator lights on body, 3hr charge time with extra long heavy-duty 16ft power cable for optional plugged in use or charging
Impact and water resistant IK07 and IP54, padded anti-marring hooks for use on interiors and painted panels

SaleRank No. #5

ATD Tools 80050A LED Under Hood Light (1500L) , White

Telescoping and ratcheting brackets allow for perfect positioning of light
UL/CUL listed

SaleRank No. #6

Aaleds Underhood Work Light, 2000LM Super Bright, 5200mAh Rechargeable LED Work lights for Mechanics, Magnetic Automotive Under Hood Light Bar Cordless Touble Light for Car Repairing/Garage/Workshop

👉【𝐒𝐔𝐏𝐄𝐑 𝐁𝐑𝐈𝐆𝐇𝐓】- Aaleds LED work light is a perfect mechanic tools light every home must own! Plenty of 2,000LM light output brightens dark spaces and the entire engine bay with all components, not only great for Car, Truck, Tractor, or other Vehicle repair/inspection/detailing jobs, it does excellent anywhere else you need lighting like home projects, garage, attic, basement, outdoors, or construction work.
👉【𝐄𝐗𝐓𝐄𝐍𝐃𝐀𝐁𝐋𝐄】- This under hood work light is a great addition to any car enthusiast! The telescopic holder is spring-loaded and extendable from the original 52" to Max.80.3", perfect tensions never crush your hood. The J-hooks on each end are sturdy steel inside, clamping the edges of the hood firmly, wrapped rubber outside keep from scratching on your car's finish. Smoothly slide the light body horizontally on the holder to adjust the light from one side to another side without demounting.
👉【𝐑𝐄𝐂𝐇𝐀𝐑𝐆𝐄𝐀𝐁𝐋𝐄 & 𝐂𝐎𝐑𝐃𝐋𝐄𝐒𝐒】- You might never use your corded drop light automotive again! This cordless mechanic light is built in a 5,200mAh large capacity rechargeable battery, only takes 4.5 hours to fully charge then lasts for 3.3 hours on high mode and 6+ hours on low mode. The charge indicator will turn green once the underhood light bar is fully charged. Works great as a portable work light, no need to replace a battery, or bulb or have a wired power source.
👉【𝐕𝐄𝐑𝐒𝐀𝐓𝐈𝐋𝐄】- These amazing hand-free designs are exactly what you need! Two strong magnetic attachments on each side of the additional bases allow you to attach the magnetic work light to iron surfaces. Two hidden swivel hooks make it easy to prop up or hang off. 360 Degree Rotate the hood light body for optimum effect, hands-free at that point and get on with whatever your task is.
👉【𝐇𝐄𝐀𝐕𝐘-𝐃𝐔𝐓𝐘】- Made of the highest quality material that makes this workshop light stand apart from the crowd: Sleek and sturdy all-aluminum holder, impact-resistant lens cover and hard rubber non-slide grip ensure optimal durability and compaction. Dual on/off buttons, one located in each handle operate in tandem. Add this lighting addition to your mechanic supplies for a strong and reliable work light for garage!

SaleRank No. #7

GreceYou Under Hood LED Light Kit, Waterproof 12V Car LED Lights Bars Car Hood Work Inspection Lights Underhood Work Light Kit with Automatic On/Off -Universal Fits Any Vehicle

【Working in The Dark】The car under hood work light is super bright, 12V-14V led strip light has a length of 36cm/14.17in, which is great for illuminating engine bays and hard to see areas under the hood of your vehicle. Perfect for automotive interior ambient lighting, gives a plenty bright lights. Allows you to work normally and easily even after dark.
【Easy to Install】You can easily fix the car LED light bar on the car hood with the help of the self-adhesive tape on the back of the light bar or use ties, without the need for additional tools, and will not cause any damage to your car. And you can remove or reinstall the engine compartment lights at any time. (Before installation, please ensure that the installation location is clean and dry.)
【IP67 Waterproof】Our led under hood lights have good waterproof performance, and excellent airtightness can effectively protect the light bar from rain, mud, dirt and grit. Extend the service life of the product.
【Wide Application】The under hood led light kit fits for all car, truck, SUV, Pickup, Off-road, trailers, camper, RV, boat and other vehicles.
【Service Guarantee】The package includes: 1pc 36cm/14.17in LED strip light, 1pc Automatic switch and 6pcs Ties. Our under hood lights undergo strict testing before shipment. If you are not satisfied with our products, or you encounter any questions during installation and use, please feel free to contact us, we will serve you within 24 hours and provide you with free return and exchange services.

SaleRank No. #8

2500LM Magnetic Underhood LED Work Light Bar - 5200mAh Rechargeable, Portable for Mechanics, Car Repair, Garage, Workshop

👍【2500LM COB Super Bright】- Ropelux bright work light produces up to 2500lm high brightness(6500K), 9.6 in length light COB board emits lighting that flooded your working area. 2-Level brightness choice meets your needs for different working scenes. Keep one portable light in your home, basement, job site, workbench, workshop, garage or trunk of vehicle for emergencies.
👍【5200mAh Rechargeable】- This cordless under hood work light built-in 5200mAh capacity battery, rechargeable by Type-C port, saving the cost of extra battery/replace. 4.5Hrs full charging time, lasts for 2.2Hrs continuous lighting in high brightness and 5.5Hrs in low brightness. 4-level power indicator allows you to check remaining battery and ensure charging the rechargeable work light in time to avoid work interruptions.
👍【Strong Magnets & Swivel Hooks】- This magnetic light has an innovative setup where both ends, each have two strong magnets, allowing you to mount the light horizontally on a magnetic metal surface using both ends (like a towel bar) while still being able to rotate the light on its axis - so you can shine the light where you want it to go. It also has two swivel hooks to hang the light to hook/string/chain over your work area and nest tight into the recesses on the back when not in use.
👍【Military Grade Designed】- Do not equip yourself with inferior cheap mechanics light! Ropelux slim bar-shaped handheld worklight features a comfortable but solid holding feeling(19.7in & 1.09lb), adopts hard rubber on each end for full protection, over-molded lens cover provides increased durability and a non-marring surface, no problems under 5ft drop test.
👍【Versatile & Relax Buy】- It is a well-built practical tool light, high-quality ABS bright orange engineering housing is high visibility for easy identification. perfect in its form and function, ideal for your intended purpose and all kinds of working scenarios, daily use or outdoor activities like car repairing inspection, troubleshooting, home lighting, camping, hiking, fishing, exploration and emergency. Relax to buy and enjoy 2-YEAR warranty.

Rank No. #9

iJDMTOY Xenon White Super Bright 30-SMD Full LED Under Hood Light Assembly Compatible With Dodge RAM, Charger; Jeep Wrangler, Grand Cherokee, etc

Compatible with Dodge 1998-2017 RAM 1500 2500 3500, 2008-2017 RAM 4500 5500; 2006-2019 Charger, 1998-2001 Durango, 2006-2008 Magnum, 1998-2000 Dakota, 1998-2001 Neon, 2002-2004 Intrepid
Also compatible with Jeep 1998-2007 Wrangler, 1998-2001 Grand Cherokee, Cherokee, 2002-2010 Chrysler 300, 2002-2004 Concorde, etc
Easy to install direct plug and play replacement of the OEM underhood incandescent lamp with or without the switch versions
This super bright 3-watt high power LED light is at least 3 times brighter than the factory incandescent lamp and will increase the visibility in your engine room area so you can do search or fix easily!
Please make sure your vehicle already come with the underhood light, otherwise, you will need to get the wiring harness (68090861AA) to complete the installation; Also when you shake this product, you will hear some rattling sound, which is normal due to its position sensor switch inside (please watch the product video for more information)

Rank No. #10

Work Light, 2500LM Bright LED Work Lights, 5200mAh Rechargeable Magnetic Underhood Work Light with Hooks, Cordless Battery Powered Mechanic Light for Car Repairing/Inspection/Garage/Workshop/Emergency

💡【2500LM COB Super Bright】- Ropelux bright work light produces up to 2500lm high brightness(6500K), 9.6 in length light COB board emits lighting that flooded your working area. 2-Level brightness choice meets your needs for different working scenes. Keep one portable light in your home, basement, job site, workbench, workshop, garage or trunk of vehicle for emergencies.
💡【5200mAh Rechargeable】- This cordless led work light built-in 5200mAh capacity battery, rechargeable by Type-C port, saving the cost of extra battery/replace. Full charge 4.5Hrs then lasts for 2.2Hrs at high mode and 5.5Hrs at low mode. 4-level power indicator allows you to check remaining battery and ensure charging the rechargeable flood light in time to avoid work interruptions.
💡【Versatile Magnetic Holder】- There are 2 powerful magnets on each end of the magnetic work light, excellent to attach to the underhood or magnetic metal surface (Not stick to aluminum), making your hand free to finish the job. The bases can swivel 180 degrees also the middle part can swivel 360 degrees to point light where it's needed as well as firmly holds its position.
💡【Military Grade Designed】- Do not equip yourself with inferior cheap flashlight magnetic! Ropelux slim bar-shaped handheld worklight features comfortable holding(19.7in & 1.09lb), adopts hard rubber on each end for full protection, over-molded lens cover provides increased durability and a non-marring surface, no problems under 5ft drop test.
💡【Widely Application】- It is a practical tool light, high visibility green casing for easy identification. Suitable for all kinds of working scenarios, daily use or outdoor activities like car repairing inspection, home lighting, camping, hiking, fishing, exploration and emergency. Relax to buy and enjoy 2-YEAR warranty.

Rank No. #11

CKEGUO Under Hood LED Light Kit, Universal Waterproof Engine Inspection Strip Lamp with Automatic On/Off for Truck Cargo Pickup SUV RV Boat

High Brightness: The under hood inspection light strip include 30 ultra-bright 5050-SMD LEDs, it is bright enough to allow you to work after dark without having to hold a flashlight or plug in a portable work light.
Durable & Weatherproof: The light strip is in IP67 sealed housing, well protect strip against raindrop, dirt and sand. Up to 30,000 hours lifespan.
Easy to Install: Self-adhesive tape on the back of LED strip for quick installation, you can also add on the included mounting hardware for extra secure. The best idea to install DIY under the hood of the car.
Truck bed lights-Universal Use: Applicable to any car model.
Package Includes: 1x 30LED Truck Engine Inspection Light Strip, 1x Automatic Switch, 6x Ties.

SaleRank No. #12

Aain Work Light,1400 Lumen Underhood Work Light Bar,Professional Rechargeable LED Work Lights for Mechanics,Portable Work Lights for Car Repairing/Garage/Workshop/Emergency

Super bright superior bright 1400 Lumens and 40 SMD LEDs enable you to Illuminate the Whole Engine Components all at once. 360 folding underhood work light features a rechargeable lithium ion battery for convenient lighting.
Rechargeable battery provides extra runtime –Charge time 3 hours holds charge for plenty long enough to use for projects. Can be recharged while in use
Flexible use, Detachable design, Adjustable padded hooks allow the work light to properly secure to almost any vehicle, can be hands-free using the folding hooks, you can hang them anywhere you want.
Provide up to 1400 lumens, the rugged, lightweight aluminum alloy frame is foldable for easy carrying and storage, Spring-loaded telescoping hooks allow use on hoods 68 inch and are foam-padded for protection, will not Scratch or Damage Vehicle
Foldable design for easy storage when not use. The softly padded hooks provide good protection against mounting surfaces. Its 40 surface-mount diodes light up the entire engine bay, and when finished with your work, you can juice it up to full charge in about four hours

Rank No. #13

Philips Xperion 6000 Under hood Work Light, 1200 Lumen Professional Flash Light with Flood Light and 360 Rotational Light Bar for Mechanics | X60BONNX1

PERFORMANCE: 1200-lumen floodlight. 360 Degree rotation. Extendable up to 6.8 feet.
MOTION DETECTION: Dirty hands? Our hands free motion detection feature allows you to turn on and off the light without touching it. Auto-off features turns the light off without motion after 5 mins.
DESIGNED TO LAST: Our head lamp is IP65 Water and Dust protection, IK07 Impact resistant, and resistant to common automotive chemicals.
LONG LASTING: Up to 20 hours of continuous use in eco mode, this portable light is dependable for all day usage.
SMART ZOOM KNOB: Dynamically adjust brightness to enhance visibility, comfort and battery life. Just rotate the knob to easily find the light output that is right for you.

Rank No. #14

Nightstick SLR-2120 Rechargeable Emergency Area Light / Under hood Work Light

Made of highest quality material
Manufacturer: Bayco
Bayco 120 LED Recharge under Hood worklight slr-2120
Two brightness modes - full-power & half-power
Dual spring-loaded grippers with 48"-77" capacity built into the cradle

Rank No. #15

LED Work Light, Taller Underhood Work Light with Magnets & Hooks, 1500LM Super Bright 3 Modes Mechanic Light, 3200mAh Portable & Extendable Rechargeable for Car repairing/Garage/Workshop/Emergency

Bright Lights with 3 Modes: Taller underhood work lights with max 1500 lumens, supports 3 modes to choose from: high, low, strobe, making it the perfect tool for any job that requires a powerful beam of light.
Hands-Free: With 3 strong magnets and 2 360° swivel hooks, this flashlight is incredibly versatile and can be attached to a wide range of surfaces. The base can swivels 180°, giving you even more flexibility in how you use it.
Extendable & Lightweight: Taller rechargeable worklight can be extended to 23'', making it easy to carry and suitable for different area. It's a great choice for car repair, boat accessories, blackout and emergency.
Rechargeable & Charging Indicator: This flashlight is lithium battery powered and can be charged via type-c cable(included), 4-6 Hrs charging time last 2-6 Hrs continuous running. Charging indicator let you know if it is full charged.
Taller Promise: This is a multifunctional flashlight, a great gift for men. We provide lifetime after-sales support and 3-years free replacment, contact us if any issue arises.

SaleRank No. #16

GEARWRENCH 1000 Lumen Rechargeable Wing Light with Underhood Rack - 83350

Dual LED 500 and 1000 lumen ratings with COB technology
Single 400 lumen spotlightSealed water resistant IP54 rating for dust and water spray
Sealed water resistant IP54 rating for dust and water spray
Rechargeable lithium ion battery with indicator provides up to 4 hours of run time
Offers constant current so the light won't dim as the battery runs low

Rank No. #17

Underhood Work Light, White Hood Lighting Car LED Lights Car Under Hood LED Light Kit with Automatic on/Off -Universal Fits Any Vehicle,12V-14V

【High Brightness and Energy Saving】Under Hood LED Light Kit adopts 6500K white light, which is very suitable for car interior environment lighting and will not harm your eyes. 5W low power consumption.
【Automatic ON/OFF】The light strip is equipped with Automatic on/off, which is convenient for you to control the light at any time according to your needs.
【How to Install】 Red wire: positive; black wire: negative. Easy to connect and install, the red wire is connected to the positive electrode of the battery.Connecte the black line to the automatic switch. Use cable ties or self-adhesive tape on the back of the light bar to fix the car LED light bar on the car hood, and you can remove or reinstall the engine compartment light at any time.There are detailed installation details in the product picture, it is recommended to refer to it.
【General LED Lighting】12V-14V LED light bar. Suitable for LED hood work lights for all cars, SUVs, pickups, off-road vehicles, trucks, trailers and other vehicles. Provide plenty of bright lights for your boats, cars, campers, vans, trucks, trailers, motorcycles and other vehicles.
【What Do You Get】1PC 36 cm/14.17" LED light bar With 2M Cable Legth, 1 automatic switch and 6 ties.

Rank No. #18

CRAFTSMAN V20 LED Work Light, Under Hood, Tool Only (CMCL090B)

2 BRIGHTNESS SETTINGS: For extended runtime or greater brightness - 600 Lumens (low setting) and 1200 Lumens (high setting)
360-degree ROTATING HOOKS: Rotating anti-marring padded hooks of the rechargeable work light extend to fit most SUV and truck hoods
EASILY STORED: Unit folds in half to 26-inch to maximize storage capability
ADJUSTABLE LENGTH: 51-inch to 74-inch adjustable length to fit most hoods
V20* SYSTEM COMPATIBLE: Part of the V20* cordless power tool and outdoor equipment system giving you the Power to Do It All: Build. Repair. Restore. Maintainch

Rank No. #19

Sunex REDLUH Underhood Light, Rechargeable, 1000 Lumens, Extendable, 360° Rotating Padded End Clamps

1000 Lumens: 1000 lumen SMD square LED Light.
Slim design: a slim design provides the user with head clearance when working under the hood.
Padded end Clamps: protect the vehicles' Paint while using the light.
Full length LED light: LEDs expand the length of the light for a consistent brightness over the entire work area.
Run time: 3 hours on high and 6 hours on low.

Rank No. #20

Work Light, BTBHIHO Rechargeable LED Work Light 1100 Lumens, Portable Flashlight with Magnetic Base and Hook 4 Modes 360° Rotate Dimmable Underhood Mechanic Light for Car Repairing/Emergency/Garage

💡【Super Bright & 4 Lighting Modes】: The rechargeable work light has 4 light modes: LED Flashlight, COB flood light, Red warning lights, flashing warning lights. Long press to adjust the brightness (Stepless Dimming). Measuring just 6.5 inches when folded, the Rechargeable Mechanic Light packs a lot of functionality into its compact design, making it ideal for vehicle inspection, in-car emergency backup, or outdoor activities.
🔋【2A Rapid Charge & Long-Lasting】: This portable work light features a 2000mAh battery capacity and a built-in "Low-Power Processor," enabling it to shine at maximum brightness for 4.5 hours or provide an 20 hours on the low setting. It takes just 2 hours to achieve full charge - half the time of similar products. The LED light offers two types of charging methods: Type-C direct charging and the Charging Dock. In addition, it includes a USB power port for emergency phone charging.
🧲【Free Hands - 3 Fixed Methods】: The mechanic work light has a Strong Magnet attached to its bottom, which can make it firmly attached to the metal surface. Moreover, it is also equipped with metal hooks and fixing clips, allowing you to use it easily in non-metallic environments (such as workbenches, camping tents, etc.), providing a variety of fixing methods, allowing you to free your hands in various working environments, improve work efficiency.
✔️【360° Ajustable & Durable Material】: The LED work light is designed with a 360° fold and 360° rotation feature, allowing you to position it at any angle for maximum illumination. Made from high-strength, tough materials, including ABS and stainless steel, the Magnetic Work Light is tough and durable, resistant to drops, sweat and slippage.
🎖️【Wide Application & After-sale Guarantee】: Whether you're a professional mechanic working on automotive repairs or DIY enthusiast, the work light is ideal for auto repair, home improvement, camping, hiking, power outages, and more. This is also a great gift idea for men for any occasion. Our aim is to provide you with a good quality after-sales service with a 30 day 100% refund or free replacement and a one year warranty. If you have any questions, please feel free to contact us.

Last update on 2023-07-30 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Underhood Light?

Do you get stressed out thinking about shopping for a great Underhood Light? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Underhood Light, which is why we have assembled a comprehensive list of the greatest Underhood Light available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Underhood Light that you consider buying. Your questions might include the following:

Is it worth buying an Underhood Light?
What benefits are there with buying an Underhood Light?
What factors deserve consideration when shopping for an effective Underhood Light?
Why is it crucial to invest in any Underhood Light, much less the best one?
Which Underhood Light are good in the current market?
Where can you find information like this about Underhood Light?

We’re convinced that you likely have far more questions than just these regarding Underhood Light, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Underhood Light, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Underhood Light. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Underhood Light buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Underhood Light currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of Underhood Light has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an Underhood Light?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Underhood Light.
Customer Ratings: Number ratings grade Underhood Light objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Underhood Light.
Product Quality: You don’t always get what you pay for with an Underhood Light, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Underhood Light is should be an indication of how long it will work out for you.

We always remember that maintaining Underhood Light information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Underhood Light is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: Are LED bulbs cool to the touch?

A: LED lights will remain cool to the touch because the tiny amount of heat that is emitted during the production of light is so miniscule that it cannot affect the temperature of the casing. LED lights are preferable to compact fluorescent lights for two very good reasons.

Q: Do LED bulbs work with touch lamps?

A: Lighting consultant Terry McGowan said that if a touch lamp has a mechanical switch, it will work with any CFL or LED bulb. However, if the lamp has an electronic switch, you’ll need to use a CFL or LED bulb that’s specially marked as dimmable.

Q: What are LED lights made of?

A: LED Materials. LED stands for light emitting diode. Therefore, LED lights are made up of small diodes. Each diode is created from semiconductor material. One of the layers of semiconductor material will have an excess of electrons, one layer will be depleted of electrons.

Q: What does a LED bulb look like?

A: LED light bulbs have been created to look very similar to that of an incandescent bulb. Unlike CFL bulbs (compact fluorescent bulbs) that come in a strange spiral shape, LED light bulbs for the home are shaped in the traditional light bulb shape in an Edison base.