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LED conversion at the office

LED conversion at the office

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At work we have square troffers with lamps in an X configuration similar to these. The other day maintenance had carted out the lighting supplies, and sure enough, it was the start of a changeover to LED. They are using LED tubes with external drivers (probably these). I believe they are 3500K like the fluorescents, but they appear slightly cooler, and also a little dimmer. It's plenty bright, so I don't mind a slight reduction. Although it's hard to tell, in the picture it's fluorescent in front, followed by LED, followed by more fluorescent. It's a large building so it will probably be a while before all of the fluorescent lamps are gone. I asked one of the workers and he said they had not budgeted for the entire office yet, so it will probably just be this section for the immediate future.

feit-curved-st19m.jpg feit-curved-st19s.jpg office-led~0.jpg syl-glass-led.jpg

Light Information

Light Information

Manufacturer:General Electric
Lamp
Lamp Type:LED Tube

File information

File information

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Filename:office-led~0.jpg
Album name:Patrick / LED
Keywords:Lamps
File Size:530 KB
Date added:Mar 11, 2018
Dimensions:1600 x 1965 pixels
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streetlight98
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Mike McCann


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Mar 13, 2018 at 03:44 PM Author: streetlight98
Weird... I don't get the purpose of having an external-driver LED tube. Just use the ones that work off the T8 ballasts. I can totally see someone putting fluorescent lamps back in some day and screwing something up. Plus, the drivers are what normally goes. Now to access the failed driver you have to remove the LED tubes and ballast channel cover and in some cases take the whole light apart when you can just use direct wire or fluorescent retrofit LED tubes. Way faster to retrofit when keeping the T8 ballasts too and the T8 ballasts tend to "clean up" the power to the tube a bit. And in a pinch, they can be back converted to fluorescent (which is what most big people don't want, but if that's the case then buy new fixtures because they're FLUORESCENT fixtures...)

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LandryB
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Mar 18, 2018 at 08:27 AM Author: LandryB
I wish 3500K LED lightbulbs were common. Most of the time, all I can find are 2700K and 5000K versions.
streetlight98
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Mike McCann


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Mar 18, 2018 at 08:45 AM Author: streetlight98
I've noticed that LEDs are bluer than fluorescent for the same Kelvin rating. 3000K LED units I've seen appear between 3000 and 3500K fluorescent. 4000K LED units appear between 4100 and 5000K fluorescent. It's weird... anyone else notice it? Could it have something to do with our eyes picking up more of the blue in the LEDs, so we see a bluer light but whatever instrument assigns kelvin is seeing a warmer light?

#167

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