I agree that light schemes are better, although I'm not sold on the reason given in this article. My understanding is that eye strain isn't purely a function of brightness (accumulation of photons), but the focusing effort needed to differentiate glyphs on screen (for which dark glyphs on light reduces eyestrain).

I used dark schemes for years but having switched to a light one in recent months, I don't see myself switching back. This area is mired in dogma unfortunately.