HPL 575X is the standard long life bulb for the ETC Source4 Ellipsoidal, PAR and PARNel fixtures. Excellent output meeting or exceeding that of many similar fixtures fitted with 1000W bulbs. Wattage – 575W Voltage – 120V Base Type – Heat Sink Bulb Type – T-6 Rated Average Life – 2000hrs Color Temp – 3050K Lumens – 12360 *** This is just one option of many for your ETC Source4 fixtures. Email or call for more information on different voltages, lamp life or colour temperatures. ***