Lighting for Video issues - White Halogen bulbs?

I'm new to lighting and have a very basic understanding of what I need. Wondering if I can get some help.

I will first tell you what I think I know and what I want to do.

I have double bubble arm setup with one long and one short. I want to attach a Saekodive torch to the long arm so I can detach it for overhangs or caves and also for videoing at depth. The short arm I have not decided on what to do with that yet. I have no problems in attaching a torch - can do that.

What I have realised is that it is "white" light I need and not the standard "yellow" light. Also I need a diffuser I think - one of those detachable ones, kinda like a white lense cap. I see that the bulbs are the replaceable kind - can I get a white light bulb rather than the standard yellow hallogen light in it already. I have seen white lights in other torches of about $600 range but I am definately not going to buy a light for that much.

Can I just change the yellow globe for a white light globe, and then stick a diffuser cap over it and there is my video light? I cannot justify spending hundreds of dollars just for a light when you should be able to knock up a cheap alternative that will do the trick.

That will do for starters.

Tink

Ok, so I actually worked out a few things myself.

The dive store guy let me borrow the torch/light and play with it. Took the bulb out of the torch/light and went down to a local lighting store. They had a heap of 12 volt bulbs (down lights), and one in particular called White Pearl.

This little bulb fitted straight into the torch/light and put out a real nice glow. No beam just a white glow in a very large area. I have the old globes in the box from which the torch/light came out of and they are all sorts of weird colors and stuff but none put out white light like these little beauties I bought.

Thanks alot, the support was overwhelming <_<