The cheapest option is to wear orange glasses like the $7 Uvex S1933X. Room light is a big stimulus (especially if you don't have dimmers), and they're a lot easier to use than screen films. We measured the spectral response here: https://twitter.com/JustGetFlux/status/398599984334909440

Look at above comment about f.lux. You don't even need hardware; you can do it with software. But a quick search for such filters already delivers a lot of results: http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3D.... Just choosing one of those results randomly (http://www.amazon.com/Green-Onions-Supply-Anti-Fingerprint-P...) seems to address that light spectrum specifically: "They reduce blue light from your screen by 38% over the most harmful portions of the visible light spectrum (380 to 500 nm)"

There are a lot of people that can't/won't jailbreak their devices to install f.lux on them. That's the market I'm thinking about.

But thanks for the links on the existing screen films. Didn't know this was a thing already.

Yes. See http://humbledmba.com/become-a-morning-person-how-to-end-ins...