This is the product family you should be looking for: Philips TL-K/10-R (10 means actinic peaking at 365nm, -R means internal reflector for better yield)
P.S. 8 bulbs placed 1" apart each other (and hang about 4" above contact print frame's glass) will perfectly and evenly cover 16x20" print area - with safety space around. Looks big but you may opt to print larger later and since investment cost wouldn't be significantly higher, don't think small...
Last edited by Loris Medici; 11-14-2013 at 10:56 AM. Click to view previous post history.
Reason: added P.S.