LEDs Performance in Cold Temperatures

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Q: I have a question about the ambient air temperature sensitivity of LED under-cabinet lighting. I recently installed a countertop and sink under an existing overhead cabinet in my garage. The garage is insulated and the nighttime temperature does not go below freezing, but tends to hover between 35 and 40 degrees during sub-freezing weather. I am considering mounting a single 3- to 4-foot LED fixture to light up the sink area and counter, but I am concerned about how well LED performs in cold temperatures — say, between 35 and 60 degrees. I need a higher-output fixture to ensure adequate lighting for task work. We have strip LED under-cabinet lighting in the kitchen and we have been very pleased with it. Plus, we woud like to take advantage of the energy efficiency and slim profile of LED fixtures for my garage application. Would LED be a satisfactory choice for a garage application? Or would halogen or fluorescent lighting produce better results in lower temperatures? I’d rather not use halogen since I have received feedback from friends who use it and it seems like they are forever replacing bulbs.

A: Yours is a good question. I knew that LEDs did well in exterior fixtures where temperatures dropped into the low 20s, when CFLs in many outside fixtures would not start up. Before giving you a definitive answer, I wanted to talk to a manufacturer who makes LED task lights. I spoke with Allison Winton at Radionic Hi-Tech Inc. She said that their affordable ZX Series under-cabinet fixtures will work great in a garage type of setting where the ambient temperature is 35 to 40 degrees. They offer two color temperatures at 62 to 66 lumens per watt (which is more than adequate). They come only in 12-inch or 19-inch versions, but can be linked together. These models are plug-in, but a hard-wire version was forthcoming. If there are other manufacturers out there, get me samples so I can test them out. I’m a “show-me” kind of guy. As a side note, Winton also mentioned that LEDs in general are ideal for cooler temperature locations (down to approximately 20 degrees). Stores like Wal-Mart have installed LED lighting in their freezers and refrigerators because they hold up so well in cool settings and save energy in these types of “24/7” applications. A million Wal-Marts can’t be wrong.

Randall Whitehead headshot

Randall Whitehead, IALD, is a professional lighting designer and author. His books include "Residential Lighting, A Practical Guide." Whitehead has worked on projects worldwide, appeared on the Discovery Channel, HGTV and CNN, and he is regular guest on Martha Stewart Living Radio. Visit his website www.randallwhitehead.com for more information on books, upcoming seminars and the latest lighting trends.

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Submitted by Sharon Davies (not verified) on Thu, 03/23/2017 - 19:18

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I'm trying to find LED lights of about 40W equivalent that will work well and survive long in outdoor fixtures at temperatures down to -30. Temps rarely drop below - 20 here, but I wouldn't want want a rare coder snap to result if my bulbs set- destructing. Traditional incandescent bulbs have always worked well, but now that they are being phased out, and some of my outdoor lights are beyond my reach to replace so I have to call an electrician, it is important I find good alternatives.

Submitted by Tim (not verified) on Thu, 01/25/2018 - 17:56

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I have tried 3 different brands of “wall pack” LED lights for outside our business. Two different part numbers from Lowes were the worst disappointment. At 5 degrees above zero neither would turn on. All I got was a faint glow from the units. I monitored temps and found one would turn on at 22 and the other didn’t turn on until 38 degrees Fahrenheit. They were both in the 60-70 dollar price range. Next I bought a name brand light at the local professional electric store. It was $249. It would work down to 6 degrees. At 5 degrees it wouldn’t come on. Lastly I bought another name brand light for $150. It works down to about 0 degrees. At minus temps it wont come on either. We had weeks of weather lower than -10. Don’t buy LED for real cold weather. You WILL be in the dark until it warms up!

Submitted by Tim (not verified) on Thu, 01/25/2018 - 17:57

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I have tried 3 different brands of “wall pack” LED lights for outside our business. Two different part numbers from Lowes were the worst disappointment. At 5 degrees above zero neither would turn on. All I got was a faint glow from the units. I monitored temps and found one would turn on at 22 and the other didn’t turn on until 38 degrees Fahrenheit. They were both in the 60-70 dollar price range. Next I bought a name brand light at the local professional electric store. It was $249. It would work down to 6 degrees. At 5 degrees it wouldn’t come on. Lastly I bought another name brand light for $150. It works down to about 0 degrees. At minus temps it wont come on either. We had weeks of weather lower than -10. Don’t buy LED for real cold weather. You WILL be in the dark until it warms up!

Submitted by raelph houghton (not verified) on Wed, 05/23/2018 - 18:47

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What if the ambient temperature on the ceiling of a room is +42C (centigrade) ??? Can I use LED downlights ?????