ConstantColor CMH Tubular Dimmable

Commercial areas / city beautification / architectural
Street and Pedestrian

    ConstantColor™ CMH lamps combine the HPS technology (providing stability, efficiency & uniformity) and the Metal Halide Technology (providing bright white quality light) to produce highly efficient light sources with good colour rendering and consistent colour performance through life. This is achieved by using the ceramic arc tube material from the LucaloxTM lamp, which minimises the chemical changes inside the lamp through life.


  • Easy retrofit for High Pressure Sodium lamps
  • No ballast thermal protection required
  • Consistent colour over life
  • Colour uniformity lamp to lamp
  • Excellent colour rendition (CRI: 80+)
  • Up to 24% higher efficacy than Quartz Metal Halide
  • Up to 20,000 hours life
  • UV control

Specification summary

Wattage [W] 150
Voltage [V] 95
Lumens [lm] 14500
Cap/Base E40
Bulb Shape T
Bulb Finish Clear
Colour temperature [K] 4000
Colour Rendering Index (CRI) [Ra] 89
Colour Code 842
Dimming Capability Yes
Lamp Current [A] 1.80
Maximum Overall Length [mm] 207
Light Center Length [mm] 132
Design Ambient Temperature [°C] 25
Ballast Required Yes
Burn Position U - Universal
Chromacity Coordinate X 0.377
Chromacity Coordinate Y 0.376
Net weight per piece [g] 146
Gross weight per piece [g] 178
Pack Quantity 12
Outer case size 215 x 162 x 284 (mm)
Mercury Content [mg] 7
UV radiance Exempt
Brand General Electric (GE)



70W 100W 150W
A Lamp MOL [mm] 156 211 211
B Diameter (max) [mm] 39 48 48
C Lamp LCL (nominal) [mm] 102 132 132
D – Burner Width [mm] 8.9 8.8 11.9
E – Burner Height [mm] 12.2 16.8 21.2
Arc Tube Eccentricity [°] 3 3 3
Base Temperature [°C] 210 210 250
Bulb Temperature [°C] 320 320 400
Base Type E27 E40 E40


In certain cases, dimming may be acceptable, subject to further testing. Contact your GE representative for more information. Large changes in lamp power alter the thermal characteristics of the lamp resulting in lamp colour shift and possible reduction in lamp survival.

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