Hi Mike, 75 watt incandescent bulbs are all over eBay and Amazon. You will have to buy more than one. Jim W5JO -----Original Message----- First problem was finding a 75W incandescent bulb. Closest I came was a 73W halogen bulb. Q1 - will that work? Q2 - the bulb is not shielded. Do I need to worry about that? Any help appreciated.