Well I got an old tungsten lamp yesterday with a 500W bulp. Measuring with my sekonic at approx 1m I got f/4.0 + a bit, 1/60sec @ 100ISO. Ouch, the thing generate more heat than light and the lady of the house didn't like the idea of posing for me so close to that toaster. Thank god I didn't throw money after the kit after all, now I can safe for a cheap 200-250Ws flash instead
Regards S°ren