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◗ Ordering Information
Ordering Code MS250/U/PS
ANSI Designation M153/M138/E
Product Number 232801
Description Pulse Start Metal Halide
Package Quantity 12
◗ Physical Characteristics
Bulb Size ED-28
Bulb Finish Clear
Base (Nickel-Plated Brass) Mogul Screw
Max. Overall Length (MOL) 8 5/16" (211mm)
Light Center Length (LCL) 5.0" (127mm)
Arc Length 1.36" (34.5mm)
Arc Tube Material Quartz
Max. Permissible Bulb Temp. 400°C (752°F)
Max. Permissible Base Temp. 210°C (410°F)
Maximum Bulb to Base Eccentricity 3º
Maximum Arc Tube to Base Eccentricity 3º
◗ Operating Characteristics (Photometric)
Horizontal Vertical
Rated Initial Lumens
1,2
20,000 22,000
Mean Lumens,Approx.
1
,3,4
14,000 15,400
Rated Average Life, Hours
5
12,000 12,000
Correlated Color Temp. (CCT)
3
4000K 3800K
Color Rendering Index (CRI) 62 62
Efficacy (lpw) 80 88
CIE Chromacity Approx.
3
x-.384, y-.398
◗ Operating Position
Universal
Note: Pulse Start Metal Halide is designed for operation on only approved ballasts
with Metal Halide Pulse Ignitors.
5"
8
5
/16"
Pulse Start Universal Metal Halide
250 Watt Lamp (Clear)