Forum Discussion
ktmrfs
Sep 15, 2015Explorer II
D.E.Bishop wrote:
I will say it again, from my experience and studies I have read, the difference between 2600 and 2700K is not very much. The difference between 2600/2700 to 3000/3500 is very noticeable and why my wife doesn't like the 3500K. She uses OTT lights for hand sewing and occasionally for machine sewing but hates to read by them.
Incandescent lamps with clear envelopes are harsher and darker(yellower) than ones with frosted envelopes. Most automotive lamps are clear therefore, darker and as time passes the kelvin drops as well as the lumens. It is easily explained through physics but very boring and I don't have copies of the studies done on the deterioration at hand, in fact they were left in my file cabinet when I retired.
I'm a cheep a$$ and haven't found the LED panels to replace the OEM lamps in our two lamp fixtures that are really close to 2700k. I gave up a few years ago and haven't looked on eBay for a long time. Maybe it's time to try again as they Asian manufacturers have become more sophisticated and better at identifying the color.
Cree 120V warm white bulbs are 2700K.
Also, there are 2700K LED 120V bulbs out as a specialty. superbright LED's has them as a substitute for "antique" style bulbs. Uses "cob" LED's to make it look more like a long filament of old style bulbs.
But so far I haven't seen any 12V below 3200K. and 3500K seems to be more common for the "warm white" color temperature. Seems like LED's are being designed to match floresent tube color temperatures, the "warm white" 3500K, "cool white" and "daylight" color temperatures. Cree is one exception with the LED edison base bulbs is at either 2700 for the "warm white" color
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