Philips 278168 - Manual

7"
11 1 / 2 "
◗ Ordering Information
Ordering Code MS400/BU/PS
ANSI Designation M135/M128/S
Product Number 278168
Description Pulse Start Metal Halide
Package Quantity 12
◗ Physical Characteristics
Bulb Size ED-37
Bulb Finish Clear
Base (Nickel Plated Brass) Mogul-Screw
Maximum Overall Length (MOL) 11 1/2'' (292mm)
Light Center Length (LCL) 7.0'' (178mm)
Arc Length 1.57'' (40mm)
Arc Tube Material Quartz
Max. Permissible Bulb Temp. 430º C (806º F)
Max. Permissible Base Temp. 210º C (410º F)
Max. Bulb to Base Eccentricity 3º
Max. Arc Tube to Base Eccentricity 3º
◗ Operating Characteristics (Photometric)
Approx. Initial Lumens 1,2 42,600
Approx. Mean Lumens 1,3,4 29,820
Rated Average Life, Hours 5 20,000
Correlated Color Temp. (CCT) 3 4100K
CIE Chromaticity Approx. 3 x-.385, y-.400
Color Rendering Index (CRI) 62
Efficacy (lpw) 106.5
◗ Operating Position
Base Up ± 15º–Open or Enclosed Luminaires Unless Otherwise Noted
Note: Pulse Start Metal Halide is Designed for Operation
on Only Approved Ballasts with Metal Halide Pulse Ignitors.
MS400/BU/PS
Lumen Maintenance
BURNING HOURS
RATED AVERAGE LIFE 20,000 HOURS
100%
90%
80%
70%
60%
50%
40%
0 2000 4000 6000 8000 10000
% LUMEN
MAINTENANCE
Pulse Start Metal Halide
400 Watt Lamp (Clear)