Thanks for the info. I've got a bit of time to search and a lot of research to do in the process. HLG isn't a brand I'm familiar with (as with a bunch of brands I've seen in my recent search, boy has the selection blossomed and changed since last I was in the market) but I will keep it in mind. A quick glance indicates it is at similar price points and similar specs to other light setups I've seen recently. I'll keep the ppfd info in mind. when I last bought that info was only available on very hi-end models and I never really got deep into the light specification themselves but I guess that information is more available and the importance of which I might need to address. In short, good info and if you have any more hints or tips keep them coming. I very strongly believe more information is always better than less when making a decision.