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Master Of Light HR400DX33 (2 Pack) 400 Watt Coated ED37 Mercury Vapor Lamp 400W E39 Mogul Base, White Coated Bulb, Unprotected Arc Tube - ANSI M59/S Replaces BT37 Bulb - Amazon.com
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Source American standard type 400w metal halide lamp MH lamp elliptical ED37 shape E40/E39 base on m.alibaba.com
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