What do you mean by 'truly red'? 1900 K (or 2000 K – no big difference) is not red but orange-yellowish. Max 'ct' input is 500 (500 mired = 2000 K). That's the technical limit of the bulb according to Philips.
A CT-XY converter: http://www.ledtuning.nl/en/cie-convertor
Here's what Philips dev says about different modes:
We can also choose to address the color point of light in a different way, using colors on the black curved line in the center of the diagram. This is the line that follows white colors from a warm white to a cold white. hue supports color temperatures from 2000K (warm) to 6500K (cold) with great white light. To set the light to a white value you need to interact with the “ct” (color temperature) resource, which takes values in a scale called “reciprocal megakelvin” or “mirek”. Using this scale, the warmest color 2000K is 500 mirek ("ct":500) and the coldest color 6500K is 153 mirek ("ct":153). As with xy, the light will go to the closest value it can produce if the specified color temperature is outside of the achievable range.
Still doesn't explain why I can go outside 6500-2000K using 'xy' mode. I noticed Philips sometimes talks about 'functioning white light'. Anyone know what this means?
@Dugie Well, I don't think they will consider using Hue bulbs (they might) but I'll say that looking at the fluxometer, the Hue bulbs miss the blue spectrum quite a bit, it's more purple, and it has less cyan (aqua) than other LED bulbs. This means it's not as effective when waking you up.
With that said, I set my hue lights to come on around... uh 6:00 A.M., and well, they did the trick. I was so confused as to why it was so bright. I'd wanted to do it slowly, but I couldn't set it up properly. Yeah 1,200 lumens of any light at full brightness will get you out of bed. And I turned that light off, as it was still 6 A.M. and I had no reason to be up that early, and it was very overcast outside. So they work, but the color quality isn't great. I think I had them set to around 3400K or so, not overly white, and in this range, the colors are decent.
There's more blue light in the morning sunlight than there is in the evening sunlight. This is due to a mild Blue Shift effect as the sun "rises" to its highest point in our sky, and then there's a mild Red Shift effect as it sets from that point on.
So, it's more than an opinion; it's what we need.
@timpster I have a window, it's small, I could jump out of it if I had to. My room is immediately next to the back stairwell, the bathroom is across the hall, and there's a front stairwell too. Thanks for mentioning it though.
Dimitri, if you are experiencing SAD symptoms, that's beyond the capacity of an app or a web forum to intervene. Lots of clinicians recommend f.lux to their patients, but that does not mean it's right for everyone so you need to ask a doctor. Locking this thread: we don't give medical advice.
Yes, we're looking for a way to make this general, so we don't have to write code for each one. We'll probably offer something that talks HTTP to any endpoint, and then if you need to do a UDP protocol you just hack up a localhost python or node.js server to do it.
Longer-term though, nobody leaves their PC on 24/7 just to do circadian lighting, so we have other plans in the works. :)
There's a flicker in the LED ropes I bought. Cool white and orange, the former being a lot more infuriating.
The blue Incandescent is nice though, more like aqua/green. Should I discuss the flicker with the company? My Ben Q monitor doesn't have this issue nor do good quality LED bulbs etc.
Are you saying that the Red (in RGB) is not actually red?
No, I'm not saying the red will be pink, that was referring to the beetle night light I provided a link to, red should be very red on your lights. If you have a deep blue colored dish or bottle, hold it up to the light. I promise this works, if you see any pink, (it's not deep red / black) then there is some blue light. Let us know!
The LED lamps still have a long way to go
The LED lamps still have a long way to go
The 16th China International Lighting Fair (Autumn Fair) will be held from 22-26 October