Just in case: there are yellow glasses marketed specifically for use at the computer and for avoidance of blue light.

(This is not an endorsement, however.)

does someone have any idea if they really have the same effect than f.lux?

I got a pair of blue-blocking lenses that are much more aggressive than f.lux. Personal annecdata from my wife and I is that they are fantastic. I can feel my whole body relax when I put them on, and I can go straight to bed after using screens.

Went with these ones: https://spectra479.com/products/clip-on-lenses-blue-blocking...

They work pretty much the same way, so I think there shouldn't be a difference in regard to computer screens. As for the surroundings—I toyed with cycling glasses for a bit, which for some reason had amber-yellow plastic, and personally I prefer to just have yellow ‘evening’ lights in the rooms.

With cycling glasses, I had more of relaxing effect due to them keeping moisture on my eyes, instead of it being burned away by the winter heating.

My eye glasses filter it out but I honestly haven't been able to tell a difference.

More like ultra-bright leds :)