-- vanilla day/night cycle, mostly just here as reference
-- ~7 minute cycle, 3m28s of full light, 1m23s light to dark, 42s full dark, 1m23s dark to light
game.player.surface.ticks_per_day = 25000
game.player.surface.dusk = 0.25
game.player.surface.evening = 0.45
game.player.surface.morning = 0.55
game.player.surface.dawn = 0.75