Dark is hard to see. Light is easy to see. I use light at every opportunity. Dark partially grew out of an interest in saving battery power on early oled screens, but dev's noticed a certain demographic drawn towards the dark look.
>>IndySu+(OP)
Dark versus light, in general, is fascinating. My fiancee and I have really different light sensitivities. She'll struggle to see in dimmer/only natural light indoors and I'll be able to see fine. Turning on overhead lighting really bothers me and causes a stress-like reaction. I'm much more amenable to artificial light after sunset and if it's indirect, diffuse light (i.e. a standing lamp).