Original Manufacturer part number is EC.J3901.001 OEM (Original Equipment Manufacturer) lamps are produced by the projector manufacturer and are identical to the lamps supplied originally with the projector. The majority of projector manufacturers will use bulbs from the world leading bulb manufacturers (e.g. Philips, Osram, Ushio etc.) and fit them in their own modules to produce the complete lamps. These lamps are produced to a very high standard and in a controlled environment, ensuring that the end user will benefit from the best performance possible. All OEM lamps are supplied with the 3 month manufacturer warranty