Well yeah I probably should've clarified that I've only tested it for CS (don't know if it makes any difference on other games ¯\_(ツ)_/¯), and I called it "No lag nightvision" simply because it doesn't drop my FPS (and I didn't know what else to call it), unlike the default CS nightvision.
I've made it for mods where you would prefer to constantly have 100FPS (deahtrun and kz) - and some maps are really really dark.
Here are some 3rd person screenshots, and the difference it makes for my FPS compared to CS's default nighvision: