Borrowed kids 2 lamp worklight. Uses 500w bulbs. 1 was burnt out. I used light for 2 hrs in garage. Heat is nice in winter. Today 2nd bulb died. Went to store, they had nice led conversion bulbs for $24. Hmm, I got 2 150watt bulbs for $4. Used light for 1 hr. would take 250hrs of use to break even. And son would have light. Ain't gonna do it. But led light was pretty cool. T-3 style bulb.