EDIT: I didn't see buzz's reply when I wrote this. As always, he's on point and accurate.
On August 5, 2016 at 12:48, Lowhz said...
The problem with those Cree LEDs is that as they dim down to 15%-20% BUT they never change color. They get dimmer but their color temperature is the same whereas incandescents get cooler as the get dimmer.
Before very recently we have only had dimming incandescents, so we have simply gotten into the habit of seeing the color change. Nobody said "let's invent a type of bulb that goes yellowish before going out." That's just the way it worked and we accepted it.
The system I described above used cool white 12V LEDs and the client loves it. There is no color change at any level and it has never been an issue with anyone.
I use these Phillips
[Link: homedepot.com] where they have a 2-stage LED in there. At low levels they are a cool color temp and at high levels they move to about a 3000 kelvin.
A cool color temp is 5000 - 6000-ish K, 3000 is a lower K but we call it "warm white." But yeah, I see the idea.
They are the closest to incandescents as I've seen for coloring but they dimming is a little herky jerky.
I think it's the controller, not the LED, but that's what you get when you try to power control circuitry off of a voltage that is declining to zero.
The point of dimming is the end point, not the dimmer travel anyway.
True, but when the dimmer travel always exhibits jumps in level at the same place, rather than a smooth transition, people could complain about that.
We are technologists.* Doing BOTH well is possible and important.
The point of stopping at a stop sign is to stop, but if the driver gradually slows, then at ten MPH they STAND on the brake, people could complain about that.
*
[Link: remotecentral.com]
Last edited by Ernie Gilman on August 6, 2016 00:54.
