So i finally bought the smart lights and can answer my own question:
No, the Alt+PgDn & Alt+PgUp shortcuts don't adjust the brightness.

Yes, please! I agree with this. I use Excel a lot (main reason I need f.lux) and alt+PgUp is the shortcut to scroll across spreadsheets.

So I have to click in f.lux, click Options and Smart Lighting, check the Hotkeys to On, adjust the brightness, then check Hotkeys to off. It's too many clicks!

Either the option of changing a Hotkey or a simple brightness slider would be brilliant. Thank you!

@Labargoth I have the same issue, as for now the only solution is to close f.lux

Usually the brightness keys should control the backlight and not interfere, but it sounds like they are doing something else.

You can try right-clicking on the desktop and choose "Intel Graphics Settings". Look in Power and see if any of the settings there make a difference. (Personally I always turn off dpst because I don't like how it looks).

There is also a slightly newer driver for the Intel 620, not sure if that would help or not:
https://downloadcenter.intel.com/product/96551/Intel-HD-Graphics-620

Whoa. Nice find!! This is definitely better than ScreenBright. No, it's not just better, it destroys it.

Well that link is done, I'll have to find another one. I've seen a bright samsung TV on ebay for about $1,500 or more.

I think we should look into the effects on vision with screens 2" away from our face. I just don't like the idea.