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GE 400-Watt EQ ED37 Cool White Mogul Base (e-39) Metal Halide Light Bulb in the Specialty Light Bulbs department at Lowes.com
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Sylvania 400W BT37 Metal Halide HID Light Bulb, EX39 Base, 40,000 Lumens, 3600K, Clear - 1 Pack (64705) - High Intensity Discharge Bulbs - Amazon.com
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LEDVANCE Sylvania 400W Metal Halide ED37 Light Bulb, E39 Mogul Base, Base-Up Position, 1 Pack - Amazon.com
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