It's not ideal, but I don't think it's really hazardous. The enlarger is like this one http://www.flickr.com/photos/vegaluthier/4409261714/
Originally Posted by cliveh
The bulb is where you see the cooling slots on the head the tray is in the enlarger body. The head is actually a separate compartment and most heat stays there.
i need to check the bulb. There are no specs really, it has 5cm diameter and uses 12V. I'll try to find something after Easter holidays (the stores are closed). It would be cool to try LED actually.