ConstantColor™ CMH Tubular Clear

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 Lucalox™ lamp, which minimises the chemical changes inside the lamp through life. When combined with the halide doses used in Arcstream™ Metal Halide lamps then the quality and stability of the dose maintains the colour consistency. Hence the name ConstantColor™ CMH.

Metal halide lamps, traditionally made with quartz arc tubes, are prone to colour shift through life and lampto-lamp colour variation. Some of the dose, e.g. sodium, (an important component of metal halide lamps), can migrate through quartz to cause colour shift and loss of light through life. The ceramic arc tube resists this material loss, can be manufactured to tighter tolerances and withstands a higher temperature to provide a more constant colour.


Product code Description Wattage
Lumen [lm] Base
357393 93102170 CMH150/TT/UVC/U/942/E40 TU 150 14500 E40
357357 93102206 CMH250/TT/UVC/U/942/E40 TU 250 25000 E40
357583 93102169 CMH250/TT/UVC/H/830/E40 TU 250 20000 E40
357631 93102159 CMH250/TT/UVC/U/830/E40 TU 250 25000 E40
357713 93102166 CMH400/TT/UVC/U/830/E40 TU 400 41000 E40