Hi,
Nobody can tell you that for sure - it depends on the temps it is generating on the screen itself and in the tank - and you don't have the equipment to measure that.
Just to add I had ceramic heaters that had a possible surface temp of 700 degrees F so a gap between that and the screen probably isn't the worst idea I have ever heard.
The dimmer and the thermometer comes to $20.
Instead of plexiglass you can cover the lid with foil taped on the outside of the screen to hold in humidity for a couple of bucks.
And I'm a little confused - where did anyone mention zoomed stuff?
dr del
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