SYLVANIA 64490 - 400 Watt - BT37 - Metal Halide

Unprotected Arc Tube - 4000K - ANSI M59/S - Mogul Base - Universal Burn - M400/U

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SYLVANIA 64490 - 400 Watt - BT37 - Metal Halide

Unprotected Arc Tube - 4000K - ANSI M59/S - Mogul Base - Universal Burn - M400/U

High performance SYLVANIA METALARCmetal halide lamps are among the most energy efficient sources of white light available today for many interior and exterior applications. Please note that metal halide lamps cannot be operated without a ballast. Suitable for open luminaires only if operated vertically +/- 15 degrees, provided the installation is not near people or flammable or combustible material; otherwise, this lamp must be operated in a suitably enclosed luminaire. (Additional information available upon request.)



  • Lead-free welded base and lead-free glass
  • Durable mount structure and lamp construction
  • Available in clear and coated
  • Good CRI


*Mercury containing products sold into the state of WA include an environmental handling charge of .25/each

LED Panels & Troffers


Stock Code:MH-04001SYL
ANSI Code:M59/S
Base Type:Mogul (E39)
Diameter:4.6 in.
Fixture Type:Open or Enclosed (Restricted Position)
Lumens (Initial):36000
Case Quantity:6
Part No.:64490
Wattage:400 Watt
Bulb Shape:BT37
Color Temperature:4000 Kelvin
Length:11.5 in.
Life Hours:20,000
Burn Position:Universal

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Customer Reviews

Rated 4.9 out of 5 by 14 reviewers.
Rated 5 out of 5 by Good price, fast service. Good quality product at on sale price. Got what we ordered quickly. Will use again. March 3, 2015
Rated 4 out of 5 by Very good price We use 22 of these bulbs in one room. We save considerable buying from 1000 bulbs. These are the older style bulbs where the new style bulb is considerably smaller and easier to install. January 26, 2015
Rated 5 out of 5 by Exactly what we ordered and high quality. High quality, exactly what was ordered. December 1, 2014
Rated 5 out of 5 by great price, great bulb The sylvania 400 watt metal halide gives the truest natural light color of any metal halide i've tried .At this price you can afford to replace often and keep your lumen output high.Terrific results.Highly recommmended May 10, 2012
Rated 5 out of 5 by This product is just as advertised! This product is outstanding compared to its cost! Identical to what I needed to replace. Thanks for being in this businedd! March 19, 2012
Rated 5 out of 5 by Great Lamps I'm very satified with the lamps and the price. Overall a great value. February 15, 2012
Rated 5 out of 5 by Great product at a great price. We are a sign company that also maintains billboard lighting and parking lot lamps and we define value by product quality and cost and have found the Sylvania 64490 - BT37 - METALARC bulb from 1000 to be our best value in replacement lamps. The quality of this product makes it a profitable addition to our business and a very good value for our customers. Paul W. Creative Impressions. October 31, 2011
Rated 5 out of 5 by Great item. These bulbs are much brighter than the ones being replaced with the same wattage. October 29, 2011
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