I am shocked beavercleaver, I have used spinosad before with zero ill effect. How much did you use per gallon? Spinosad is known to be non phytotoxic, that is to say, it shouldn't matter if your spray with your lights on. It's the only thing I have ever sprayed in my life with the lights on. When I sprayed I didn't raise my lights, but my temp at the top of the canopy is 75deg, with my plants almost touching the lenses.

I will also say I've never used it in flowering, but that's not supposed to matter with it either...

In my opinion, there must have been too much spinosad in the mix. I use 60 mL per gallon...

Hope this helps, sorry you're hurtin'