Glass top+raised light?

[mitchfish9]

I don't have this issue, but I was wondering if someone had a glass top, but they needed to raised their light. Wouldn't this block out a lot of light because there is not enough heat coming from the light to clear the evaporation off the underside of the glass? Because when the light is directly on top the heat clears the class directly underneath.

Just wondering if anybody has any experience with this.

Thanks!