Osram M400/U (64490) - 400W METALARC quartz metal halide lamp, E39 base, BT37 bulb, enclosed fixture rated, universal burn, clear, 4000K

Product Information
Abbrev. With Packaging Info. M400U 6/CS 1/SKU
Approx. Lumens (initial - horizontal) 32000
Approx. Lumens (initial - vertical) 36000
Approx. Lumens (mean - horizontal) 20500
Approx. Lumens (mean - vertical) 23500
Arc Length (in) 1.77
Arc Length (mm) 45
Average Rated Life - Horizontal (hr) 15000
Average Rated Life - (hr) 15000
Average Rated Life - Vertical (hr) 20000
Base E39 Mogul
Bulb BT37
Color Rendering Index (CRI) 65
Color Temperature/CCT (K) 4000
Diameter (in) 4.606
Diameter (mm) 117.00
Family Brand Name Metalarc®
Fixture Requirement S
Hot Restrike Time (min) 7-12
Lamp Finish Clear
Light Center Length - LCL (in) 7
Light Center Length - LCL (mm) 178
Maximum Base Temperature - Fahrenheit 482
Maximum Base Temperature - Celsius 250
Maximum Bulb Temperature - Fahrenheit 752
Maximum Bulb Temperature - Celsius 400
Maximum Overall Length - MOL (in) 11.5
Maximum Overall Length - MOL (mm) 292
Nominal Voltage (V) 135.00
Nominal Wattage (W) 400.00
Operating Position Universal
Warm-up Time (min) 2-4

•20,000 average rated life based on 10 hrs/start. 30,000 average rated life based on 120 hrs/start.
•S = When operated within 15 degrees of vertical, this lamp may be operated in an open luminaire provided the installation is not near people or flammable or combustible material, otherwise it must be operated in a suitably enclosed luminaire. See lamp warning.