ConstantColor CMH PAR 20


Product information

ConstantColor™ CMH lamps combine the HPS technology (providing stability, efficiency & uniformity) and the Metal Halide Technology (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. When combined with the halide doses used in ArcstreamTM Metal Halide lamps then the quality and stability of the dose maintains the colour consistency. Hence the name ConstantColor™ CMH.


Application areas

  • Retail
  • Offices
  • Architectural floodlighting
  • Amenity areas
  • Hotels


Features

  • Excellent colour consistency
  • High efficient compact source
  • Unique 3-part ceramic arc-tube design provides higher durability resulting in better reliability
  • Up to 13,000 hours Life
  • High 80+ to 90+ colour rendering index (CRI)
  • UV control
  • 20W PAR 20&30 lamps operate on electronic ballast (thermal protection needed)
  • 35W PAR 20&30 lamps operate on standard or electronic ballast (thermal protection needed)
  • 70W PAR30&38 lamps operate on standard or electronic
  • 100W PAR38 lamps operate on standard or electronic ballast (no thermal protection needed)


Specification summary

Product Description Wattage [W] Lamp Current CCT [K] CRI [Ra] CAP Length [mm] Initial Lumens [lm] Avg.Life (Hr) Pack Qty. CBCP Beam Spread Burn Position
ConstantColor™ CMH PAR 20
CMH20/PAR20/UVC/830/E27/SP 20 0.2A 3000K 80+ E27 92 1000 12000 1/6 13000 10° Universal
CMH20/PAR20/UVC/830/E27/FL 20 0.2A 3000K 80+ E27 92 1000 12000 1/6 3750 25° Universal
CMH20/PAR30/UVC/830/E27/SP10 35 0.5A 3000K 80+ E27 92 2100 10000 1/6 22000 10° Universal
CMH35/PAR20/UVC/830/E27/FL 35 0.5A 3000K 80+ E27 92 2100 10000 1/6 7500 25° Universal
CMH35/PAR20/UVC/942/E27/SP10 35 0.5A 4200K 90+ E27 92 1950 10000 1/6 19450 10° Universal
CMH35/PAR20/UVC/942/E27/FL25 35 0.5A 4200K 90+ E27 92 1950 10000 1/6 6950 25° Universal
ConstantColor™ CMH PAR 30
CMH20/PAR30/UVC/830/E27/SP10 20 0.2A 3000K 80+ E27 124 1200 12000 1/6 19800 10° Universal
CMH20/PAR30/UVC/830/E27/FL25 20 0.2A 3000K 80+ E27 124 1200 12000 1/6 4900 25° Universal
CMH35/PAR30/UVC/830/E27/SP 35 0.5A 3000K 80+ E27 124 2400 10000 1/6 39600 10° Universal
CMH35/PAR30/UVC/830/E27/FL 35 0.5A 3000K 80+ E27 124 2400 10000 1/6 11000 25° Universal
CMH35/PAR30/UVC/942/E27/SP10 35 0.5A 4200K 89 E27 124 2225 10000 1/6 36700 10° Universal
CMH35/PAR30/UVC/942/E27/FL25 35 0.5A 4200K 89 E27 124 2225 10000 1/6 10200 25° Universal
CMH70/PAR30/UVC/830/E27/SP 70 0.98A 3000K 80+ E27 124 4700 13000 1/6 43000 15° Universal
CMH70/PAR30/UVC/830/E27/FL 70 0.98A 3000K 80+ E27 124 4700 13000 1/6 10000 40° Universal
CMH70/PAR30/UVC/942/E27/SP 70 0.98A 4200K 89 E27 124 4300 10000 1/6 33500 15° Universal
CMH70/PAR30/UVC/942/E27/FL 70 0.98A 4200K 89 E27 124 4300 10000 1/6 9000 40° Universal
ConstantColor™ CMH PAR 38
CMH70/PAR38/830/SP15 70 0.98A 3000K 80+ E26 120 4800 10000 1/6 40000 15° Universal
CMH70/PAR38/830/FL15 70 0.98A 3000K 80+ E26 120 4800 10000 1/6 14000 25° Universal
CMH70/PAR38/830/WFL 70 0.98A 3000K 80+ E26 120 4800 10000 1/6 4400 40° Universal
CMH100/PAR38/830/SP15 100 1.1A 3000K 80+ E26 120 6500 10000 1/6 45000 15° Universal
CMH100/PAR38/830/FL15 100 1.1A 3000K 80+ E26 120 6500 10000 1/6 15000 25° Universal
CMH100/PAR38/830/WFL 100 1.1A 3000K 80+ E26 120 6500 10000 1/6 5500 40° Universal


Dimensions

tech_dimension_hid_cmh_par_624x200.jpg


CMH PAR 20 CMH PAR 30
CMH PAR 38
A Maximum Length [mm] 92 124 120
B Maximum Diameter [mm] 64 95.5 97
Bulb Glass Heat Resistant Heat Resistant Heat Resistant
Operating Position Universal Universal Universal
Fixture Rating Open Open Open


Dimming

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.


Flicker

When ConstantColor™ CMH lamps are operated from a conventional magnetic ballast there will be 50Hz line frequency light output flicker typically of 1.5%, in common with all other discharge lamps. Noticeably lower flicker levels occur when lamps are operated horizontally.

Flicker levels of 1.5% do not normally cause concern to the end user, but use of electronic control gear should be considered where visual comfort and performance is critical. Suitable electronic ballasts for ConstantColor™ CMH typically provide square wave operation in the range 70-400Hz, eliminating perceptible flicker.


End-of-life Conditions

The principal end-of-life failure mechanism for CMH lamps is arc tube leakage into the outer jacket. High operating temperature inside the arc tube causes metal halide dose material to gradually corrode through the ceramic arc tube wall, eventually resulting at normal end-of-life in leakage of the filling gas and dose. Arc tube leakage into the outer jacket can be observed by a sudden and significant lumen drop and a perceptible color change (usually towards green). 


The above situation is often accompanied by the so-called rectification phenomena. This occurs where a discharge is established between two mount-frame parts of different material and/or mass, causing asymmetry in the electrical characteristic of the resulting discharge current. Rectification can lead to overheating of the ballast, therefore conventional magnetic ballasts must conform to requirements of the IEC61167 lamp standard by incorporating protection to maintain safety and prevent damage.


End-of-life cycling

A condition can exist at end-of-life whereby lamp voltage rises to a value exceeding the voltage supplied by the control gear. In such a case the lamp extinguishes and on cooling restarts when the required ignition voltage falls to the actual pulse voltage provided by the ignitor. During subsequent warm-up the lamp voltage will again increase, causing extinction. This condition is known as end-of-life cycling. Normally cycling is an indication that lamp end-of-life has been reached, but it can also occur when lamps are operated above their recommended temperature. Lamp voltage at 100 hours life should not increase by more than 5V when operating in the luminaire, when compared to the same lamp operating in free-air. A good luminaire design will limit lamp voltage rise to 3V.

It is good practice to replace lamps that have reached end-of-life as soon as possible after failure, to minimise electrical and thermal stress on ignitor internal components. The use of a ‘timed' or ‘cut-out' ignitor is not a specific requirement for ConstantColor™ CMH lamps, but is worth considering as a good optional safety feature which also prolongs the life of ignitor internal components, lamp holder contact surfaces and fixture wiring.

The operating period of a timed/cut-out ignitor must be adequate to allow lamps to cool and restart. A period of 10 to 15 minutes continuous or intermittent operation is recommended before the ignitor automatically switches off. Timed/cut-out ignitors specifically offered for High-Pressure Sodium lamps, where the period of operation is less than 5 minutes, are not suitable for ConstantColor™ CMH lamps.


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