Sylvania 64450 / 64038 MS400-BU 400W Metalarc Super Metal Halide Bulb – Base-Up BT37

Product Details

• Wattage: 400W
• Base: E39 Mogul Screw-In
• Color Temperature: 4000K Cool White
• ANSI Code: M59/S
• Fixture Compatibility: Enclosed or Open Fixtures (with restrictions)
• Maximum Overall Length (MOL): 8.31 in x Diameter 3.5 in
• Burn Position: Base-Up ±15°
• Average Rated Life: 20,000 Hours (10 hrs/start) / 30,000 Hours (120 hrs/start)
• CRI: 65

Performance Advantages

• Advanced arc tube design delivers up to 30% higher mean and maintained lumens compared to standard probe start metal halide lamps
• Reduces color temperature shift over lamp life by up to 400K
• Reaches 90% of full light output significantly faster than standard lamps
• Hot restrike time reduced by up to 60%

Installation & Safety Guidelines

• Lamp can be operated in open luminaires if installed within 15° of vertical and not near people or flammable materials
• Otherwise, lamp must be used in suitably enclosed fixtures
• Compatible with M155 or M135 pulse start ballasts with sustaining voltage > 270V

Application

• Ideal for Commercial and Industrial Lighting
• Warehouse, Gymnasiums, Manufacturing Facilities
• Large Retail Stores and High-Bay Lighting Applications