So I learned something today, and I should have thought about it well in advance.

Any light your plants do not use is reflected. Any light that is reflected eventually dissipates in the for of heat, thermodynamics comes into play.

Why do I say this?

Well, even with a second fan really pulling air through the PC case and plant thinning, I'm starting to hit temps of near-90. That poses a problem.

I'm definitely going to need to make a larger case for the next 50w grow. This is too small of a case for this much power and even though I've got nice frosty buds starting to show up, there are not enough for my liking. I really screwed up thinking this would pack the power in, I totally neglected to think of this like a basic solar-energy system - solar panels heat up from reflected light that they cannot absorb, leaves should act the same way. Even with airflow, the plant itself is getting hot, which is why I've got the burning even from a couple inches from the panel. Oh well, I've learned my lesson this time and next time I'll definitely keep this in mind.