Metal Halide HID Bulb, BT56, Mogul Screw (E39), Lumens 170,000 lm. Item # 492Y73. Mfr. Model # MH1500/U. UNSPSC #. Catalog Page # 507. 507. Country of Origin India. Country of Origin is subject to change. These HID and LED HID-replacement light bulbs have a mogul screw base, also called an E39 base.