H.A.F.
a.k.a. Rusty Nails
I think there's a formula somewhere for light/sqft of floor. You can get to the point where there's too much light. If you are having to exceed that to get the temps up another light probably isn't the solution.
Conversely, if you are nowhere near the "max light" thingy, having temperature to spare is a great thing for when you can add more light.
Conversely, if you are nowhere near the "max light" thingy, having temperature to spare is a great thing for when you can add more light.