My freshly half-specced Divine Disciple (I say half specced because I haven't used any LR yet, so no new feats or skills, just enhancement changes) uses the light based spells in her spell book all the time.
I think they're called Sunbeam and Sunburst. One is a single target ray spell and one is an AOE. There's a second single target spell that looks a bit like a lightning bolt but I use that less often.
The two spells I do use blind ALL THE TIME. It's incredibly rare for a mob to save even on Epic Elite content. They may not save at all, I may just miss some in the AOE and have to single target a couple stragglers. In any case, the descriptions note saving throws and my cleric's DC's suck, but the blindness seems to hit everyone.
I believe these spells are also druid spells. Anyone know if these have been blinding that frequently since they debuted, or if this is a recent change, and if they're WAI? Please don't post with "OMG don't tell the devs, think of the children". *IF* this is a bug the devs know already, it's that blatant.
I'm playing this toon to improve my casting skills. If it's just a pair of bugs I'd rather know so I don't get dependant on it.