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Clear glass T4.5 ceramic metal halide lamp with G8.5 base, 70W 3000K

GE Lighting

GE Lighting CMH70/TC/U/830/G8.5 70W T4.5 Ceramic Metal Halide HID Light Kit

SKU CH-D2NQ-1ZEXH

A 70 W ceramic metal halide lamp delivering 6 200 lumens at 3000 K with a CRI of 83 and a 15 000 hour rated life

  • High CRI 83 for accurate colour rendering
  • 6 200 lumens deliver bright illumination
  • 15 000 hour rated life reduces replacement frequency
  • Universal burning position allows flexible installation
  • 70 watt ceramic metal halide technology ensures efficient output

What this light kit is and who it suits

The GE Lighting CMH70/TC/U/830/G8.5 kit delivers 70 watts of ceramic metal halide illumination rated at 6,200 lumens with a warm 3000K colour temperature and an 83 CRI. It fits fixtures that accept a G8.5 two-pin base and a T4.5 glass-metal envelope measuring 3 3/8 inches overall. The lamp carries ANSI code M139 and is approved for enclosed fixtures in universal burning position. It is not for buyers who need dimming capability or a shatter-resistant envelope.

Behaviour under sustained load

The lamp maintains its rated output across a 15,000-hour life when operated on a compatible ballast, with voltage determined by that ballast rather than line supply. Colour rendering stays at the specified 83 CRI throughout the rated period, and the clear finish preserves lumen density without diffusion losses. It is not for installations that require rapid restrike after a hot restart or continuous dimming profiles.

Installation and common pitfalls

Installation consists of seating the G8.5 base into the matching socket and verifying the fixture is rated for enclosed operation with ANSI M139 lamps. The universal burning position allows any orientation, but the lamp must not be used in open fixtures or on circuits without the correct ballast. It is not for users who expect plug-and-play operation on standard mains voltage or who lack access to a compatible HID ballast.

Highlights

  • High CRI 83 for accurate colour rendering
  • 6 200 lumens deliver bright illumination
  • 15 000 hour rated life reduces replacement frequency
  • Universal burning position allows flexible installation
  • 70 watt ceramic metal halide technology ensures efficient output

Specifications

BrandGE LIGHTING

Questions about this item

How much heat and power does the 70 W ceramic metal halide draw when it runs all day?

The lamp consumes 70 W and its voltage is ballast dependant, so actual heat output depends on the ballast you pair with it.

What ballast and fixture do I need before this G8.5 bulb will strike?

You must supply an ANSI M139 ballast rated for 70 W and a fixture that accepts a G8.5 base and is rated for enclosed use.

Can I keep my existing enclosed fixture rated for the older M139 code?

Yes, the bulb carries ANSI code M139 and is approved for enclosed fixtures, so it will operate in a compatible legacy housing.

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