Well, thankyou, Dean. I am running the light theme up the flagpole at the moment. As a voracious book reader, I am mentally adjusted to black print on a white background and preferably Times New Roman typeset. Anything else jars me.
What we may be running into here is that computer displays are essentially daylight spectrum (mostly) viewed at night. You definitely don't need the blue end of the spectrum at night. It's unnatural. They always used to say you shouldn't watch TV in the dark either. Have some background lighting on too.
Our regular monitors are actually fluorescent backlit. Not a pleasant light, especially when very bright. I'm not sure your forum software is really very well designed on aesthetics. Compare with SpaceX: http://www.spacex.com/
That's even better than the previous winners, https://www.apple.com/, IMO. Apple have lost it a bit. We need a quieter World of softer colours, IMO.