Annie, Do you have a copy of Dick Arentz's book? If you do, look at page 12 and you'll see that most of the spectrum here is not where you want it - If you don't have the book you should really get a copy and it will save you money in the long run by avoiding things that don't work right.

If you want to go a very cheap route, you could try a Sylvania Sunlamp. I started making Pt prints in the mid 70's using a sunlamp and some of the ones I made then and were accepted in juried shows are as good as the recent reprints using an Edwards light box. (I presume these sunlamps are still available. I haven't look recently - ) I put the bulb in a wire cage like holder with a clamp on the end which I got in a hardware store. I think workmen use them to work in dark areas....