Things to watch for when changing lighting?

[Aquattro]

Originally Posted by BCOrchidGuy

Brad, any thoughts on PAR value of a 10,000k Iwasaki 400w vs a 10,000 Iwasaki 250w? and how about Par value of a 250w 10,000k SA? And finally, what about Par Value on a 6500k 250w Iwasaki.

Thanks Doug

I don't recall iwasaki making 10k, so no thoughts there. I also don't think about SA bulbs or 65k Iwasakis, so nada again. Steve might have thoughts on it though.
Pretty much I don't think about PAR at all. I think my Ushio 10k are pretty and bright, same for my Radiums, but with more blue. I saw some info I knew was wrong in this thread and thought I should post what little I knew to help protect some corals from bleaching. That's all.

But Steve is gonna love this thread and I'm sure he'll answer all the questions above!!