SYLVANIA 64705 - 400 Watt - BT37 - Metal Halide Protected Arc Tube - 3600K - ANSI M59/O - Mogul Base (EX39) - Base Up Burn - MP400/BU-ONLY GROU medium base bulb offers 4200

medium base bulb offers 4200 lumens of light output and has an average rated life of 8

SYLVANIA 64469 - 1000 Watt - BT37 - Metal Halide Reduced Envelope - Unprotected Arc Tube - 3800K - ANSI M47/E - Mogul Base - Universal Burn - M1000/U/BT37 BT-37 bulb with a Mogul (E39) base

Soft white color temperature of 3200K that is fully dimmable makes it easy to set the mood with your decorative lighting fixtures

Uses One 75W (Max) A19 or Equivalent CFL- Lamp not Included

SYLVANIA 64705 - 400 Watt - BT37 - Metal Halide Protected Arc Tube - 3600K - ANSI M59/O - Mogul Base (EX39) - Base Up Burn - MP400/BU-ONLY GROU medium base bulb offers 4200The METALARC PRO TECH metal halide lamps were created to fill the need for a safe light source for applications where a protective lens on the metal halide fixture was either impractical or detrimental to fixture design. Please note that metal halide lamps cannot be operated without a ballast.