Thanks! Just using a 13watt 6500k CFL. It's been working fine although I wish I had a taller lamp so I could move the bulb further away from the bowl.
You could try something like this
; I have this sitting on the mesh top of my 5.5 gallon Glass Shrimp tank, and it works nicely. You could possibly clamp it to the cubicle top and it should sit perfectly over the bowl.
...And I have that bowl at home. With nothing in it. I think it's coming to work with me tomorrow.