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Philips 321505 MH1000/U/BT37 1000W BT37 Probe Start Metal Halide 3700K Mogul E39 Base Clear Reduced Outer Jacket Bulb M47/E (928601179701) backorder714 Instant Start Electronic Fluorescent WorkHorsePhilips 321505 MH1000 U BT37 1000W BT37 Probe Start Metal Halide 3700K Mogul E39 Base Clear Reduced Outer Jacket Bulb M47 E (928601179701)