craftgrrl | Question for screenprinters about lightbulbs... (Reply)

I'm making buttons and doing some tshirts for a benefit concert this coming weekend. A friend of my mom's died last year in a car accident. He was a photographer. I'm putting some of his photos on the shirts and buttons I'm making. All of the proceeds are going towards a scholarship fund named after him. It will go towards a photography student at the local college. So remember, being crafty can be used for a good cause!

My question:
I've got my set up for screen printing, but I'm wondering what kind of bulb each of you use, and what results you get with it.
I'm using the photo emulsion process. The last time I used a 70? watt bulb with a reflector base, but this time around I don't have either. I know I'm supposed to use a 150 watt bulb, but I don't have one. I've got a lamp with 5 40 watt bulbs. The lamp has bendy arms (its my sewing lamp) so I was thinking of using it instead. Thoughts, suggestions?

Here's the design I'm printing on the shirts, so this won't be a text/question only post.