I should probably mention that my eyes are weird, and warm white 2700K bulbs (even high-CRI ones) make my eyes hurt. Everything looks all yellow; my eyes never adjust to the color temperature. I find 4500K to 5000K much more comfortable, and don’t mind cool fluorescent lighting at all unless I’m trying to discern subtle color differences.
So, YMMV.
I see everthing is yellow after i see the warm white bulb for a short time,but the same as daylight bulb,i see a lot of black spot .Is something wrong with my eyes?
how did you manage in the time of incandescents?
Badly. My eyes bugged out a lot. If I tried to read on paper, it didn’t take long before my eyes stopped seeing color entirely, and all I could see was the contrast or edges. It looked like black and white were constantly inverting a hundred times per second, or light grey and dark grey anyway, and it was rather uncomfortable.
It wasn’t long before I got a fluorescent lamp installed by my bed so I could read without issues, and I always did just fine reading from a computer screen (though black text on a white background still hurts a bit since I’m photosensitive… I prefer lower brightness and lower contrast). Green on black was great. Or amber on black. Or light grey on dark grey. It’d be nice if BLF had a darker theme available.
It doesn’t matter.i am a color weakness,i can’t distinguish the colors clearly,so it always make me uncomfortable after i see any light too long.i am better now with the time goes,the ability to distinguish colors is better,not feel uncomfortable like that.
There are people who had a way to make their own BLF theme colours on their computer, but i have no idea how to find that thread, it was a while ago, maybe last year
Oh, a client-side thingie could rewrite the page for me… but it’s not really worth the effort. 
Oh,please tell me if you find this thread,thank you
Disclaimer: the following tools require HTML/CSS knowledge, and/or much time to learn and fiddle around…
If you want control over the styling of a web site, you could try Stylish:
It’s a plugin for Firefox and Chrome.
There is a theme for BLF as a starting point:
To see what you are doing and try things out quickly, you can use a web debugging tool to see HTML styling:
https://www.getfirebug.com/ (Firefox only)
Okay, since you pretty much handed it to me on a platter… I grabbed the plugin and theme for it, and changed pretty much everything to be darker.
Now BLF looks like… 50 shades of grey. Dark grey. 
But this is BLF, you should see the light and more of it 
Thank you very much for this, I did not know of this. Helps a lot since I have a 27 inch monitor and the white of BLF blinds the hell out of me. Now how to make the white of the page a little grey…
If it helps, here is the modded CSS I made for BLF with the “stylish” plugin:
http://toykeeper.net/tmp/blf-stylish.css.txt
There’s still some weirdness with table padding or margins or borders, and a little weirdness with new private messages, and I failed to get text boxes to go darker, but for the most part it works and makes the site a lot less blinding.
It’s still fitting though… there’s a big dark void, and the things people say here provide light in the darkness.
Copied saved and enabled. Here I am, again, thanking you. My eyes can take a rest now.
now your getting poetic