I have given the issue some thought as well. f.lux integration with Hue is great, but unfortunately not a solution for me, as I'd have to keep my windows pc running all day.
What is hard about these?
For a few dollars I can convert 120v to whatever I want.
Sell a different version to Europe
A solid driver with good filtering and good thermal characteristics is expensive. So you're left with a $15 LED bulb that sits on a shelf next to $5 bulbs, selling to customers who see nothing other than two LED bulbs where one is grossly overpriced for no reason they can comprehend
The fact that this hardware runs at 120v (or 240v in my case) makes it the barrier higher as there's now a chance that making mistakes might kill me.
Additionally, the high power levels mean that adequate cooling is needed, and as a non-expert it's hard for me to know whether I've done that correctly.
Any chance we will see a non-root flux for Android?
Btw, if you don't insist on using f.lux and have root access, take a look at cf.lumen: It allows much more precise configuration (I have it remove almost all blue in sleep mode).
We thought back then that some form of "smart lighting" would be universal. This mostly hasn't happened, so the truth is that the opportunity is different than we had guessed. Today most "smart" replacement lamps are $20+, similar to several years ago, even though normal lamps are $1.
We do support a lot of integrations with f.lux on Windows, so people can use f.lux with their Hue/LIFX/yeelight/etc., but it is somewhere <2% of our users right now.