While everything others are saying is somewhat correct, you need to consider what you are lighting. If it's outdoors, you're going to want to find lights with a color temperature of 5600K (in optimal conditions). Indoors, it is usually 3200K lights. Now, unless everything else is halogen-lit where you are shooting, I'd recommend regular Tungsten (incandescent) lights.
Actually, wherever you are, Tungsten lights can come in handy. However, you need to apply color gels to make sure the light blends with other light sources.
Shooting with Tungsten (3200K) light in daylight conditions, you need to apply something called at CTB, or Color Temperature Blue filter. It will change the light temperature to 5600K, but at the price of reducing the brightness of your light.
Consequently, if you have daylight balanced lights (some halogens and tungstens are balanced for this, at 5600K), you would want to apply a CTO (color temperature orange) in traditional indoor lighting.
To get these filters, which are made by Rosco as well as Lee, you can go to a site like
http://www.smsprod.com or
http://www.studiodepot.com
Hope this helps!
Yes, I'm a film student. Fight on!