Gareth, the interior dimensions are; 17" high x 16.1/4" wide (this would be too small if you are using a contact frame for 12x16" prints) x 15" deep. This little cupboard is an ideal size for me as it sits on the floor under the enlarger bench.
Originally Posted by Jarvman
All nine lamps are wired in parallel, 3 rows of three, to provide me with not only light intensity but evenness of illumination (very important). The lights are wired to a terminal block and from there a single 3 core cable is then connected to a Viponel electronic timer which has an exposure range of 0.1 second to 16 minutes, anything longer I just hit repeat. If you are going to use an enlarger timer make sure it is powerful enough to take a total of at least 300W (my lamps are a total of 225W). The lights are fitted to a removable shelf that I can slide out for maintenance if need be.
I've also fitted an electric fan (separate circuit) to help cool things down during long exposure times. Although the cabinet is well ventilated; slight gap below door and two adjustable louvers at the top to allow free circulation of air.
When I have to dodge and burn I wear sunglasses, just to be safe, as the door is open and the UV light is quite bright. This is another reason I wanted the light box on the floor so its away from eye level. Although BLB UV lamps are safe if you use sensible precautions.
Hope all goes well and do let me know how you get on.