I see that on eBay some sellers are selling the bulb only (not the cartridge). The one I was looking at was for an Epson and the lamp was branded "Epson" and "Made in Philippines". The seller has great feedback so I emailed and asked them how can a bulb have an Epson stamp on it if Epson don't actually make bulbs. He replied saying that Epson do make bulbs. Does anyone know for sure?