There are a range of possibilities. Since the tent itself will tend to diffuse the light you probably don't need any sort of external diffuser on the lights themselves. Since the products you'll be shooting are most likely inert (not moving) then you don't need a strobe to freeze motion, although a strobe isn't a bad solution.
My first suggestion would be to get a couple of clip-on work lights (the ones with the 10" aluminum reflector and a switch on the socket) from your local hardware store and put 100 watt floodlight bulbs in them. total cost would be ~$20. Put one on either side of the tent. Make sure you keep the lights a couple of feet from the tent so you don't overheat the material. The advantage of the clip-ons is that you can use found objects (chairs, bookshelves, etc.) instead of needing to carry a stand with you..
Suggestion 2 would be to pick up a couple of cheap screw-in strobes instead of the floodlights (like these: http://www.bhphotovideo.com/c/product/121845-REG/Smith_Victor_690001_45_W_S_Screw_in_Strobe.html ). These come with a sync cord or can trigger when another flash goes off. Total cost ~$100. You wouldn't need the aluminum reflectors with these...