GE 92585 CMH70/TC/U/830 G8.5

GE 92585 CMH70/TC/830/G8.5 ConstantColor® – 70W Ceramic Metal Halide | 6,200 lm | 3000K | 80+ CRI | G8.5 Bi-Pin | ANSI M139 | 15,000 Hours | Enclosed Fixture Only

The GE 92585 (CMH70/TC/830/G8.5) is a 70W pulse-start ceramic metal halide (CMH) lamp from the GE ConstantColor® series, delivering 6,200 initial lumens at 3000K (Warm White) with 80+ CRI through a T4.5 tubular envelope on a G8.5 bi-pin base (8.5mm pin spacing — not G12). It requires a dedicated ANSI M139 or C139 pulse-start ballast and must be installed in an enclosed fixture with a UV-filtering lens only. Note: both this lamp and 70W G12 CMH lamps share the ANSI M139 ballast code, but the G8.5 and G12 bases are physically incompatible. The lamp contains mercury. Please verify base type, ballast code, and fixture enclosure before ordering.

Technical Specifications

Product Overview

The GE 92585 is a 70W G8.5 ceramic metal halide lamp from the ConstantColor® series, engineered for compact commercial luminaires where the G8.5 base format enables smaller, more discreet fixture designs than the G12 base alternative. At 6,200 lumens and over 88 lm/W at 3000K with 80+ CRI, it delivers the same output as the 70W G12 CMH platform (such as the GE 20016) in a physically smaller base format, suited to compact track heads, small-aperture recessed downlights, jewelry showcase fixtures, and gallery accent luminaires.

GE ConstantColor® ceramic arc tube technology maintains stable 3000K color output across the lamp’s 15,000-hour service life, preventing the progressive green color shift that develops in standard quartz metal halide arc tubes over time. This makes the 92585 a strong choice for retail and gallery installations where consistent color appearance across an array of lamps at different burn hours is a specification requirement.

A key ordering consideration: both this 70W G8.5 lamp and 70W G12 CMH lamps (such as GE 20016) share the ANSI M139 ballast designation, which means the same ballast can drive either lamp — but the G8.5 (8.5mm pin spacing) and G12 (12mm pin spacing) bases are physically incompatible. The fixture socket must be confirmed as G8.5 before ordering, regardless of the ballast ANSI code.

Compatible Applications

• Compact CMH track heads and accent fixtures designed for G8.5 20W or 70W platforms
• Small-aperture recessed downlights with G8.5 CMH sockets
• Jewelry showcase and retail display fixtures
• Gallery and museum accent luminaires
• Hospitality and architectural accent lighting
• Any enclosed G8.5 ANSI M139 70W 3000K CMH lamp position

Before Ordering – Verify

• Base type: This lamp has a G8.5 bi-pin base (8.5mm pin spacing). Even though the 70W G12 CMH lamp shares the same ANSI M139 ballast code, the G8.5 and G12 bases are physically non-interchangeable. A G8.5 lamp will not seat in a G12 socket. Confirm the fixture socket is specifically G8.5 before ordering. For G12 socket fixtures at 70W 3000K, see GE 20016 (CMH70T/U/830/G12).
• Ballast ANSI code: This lamp requires a pulse-start ANSI M139 or C139 ballast. Probe-start and standard quartz MH ballasts cannot generate the ignition pulse required by the ceramic arc tube and must not be substituted. Confirm your ballast is rated for ANSI M139 pulse-start at 70W before installing this lamp.
• Enclosed fixture with UV-filtering lens required: This lamp emits UV radiation and must not be installed in open-face track heads or any fixture without a UV-filtering front lens. The fixture must remain fully enclosed during operation. Replace any cracked or damaged fixture lens immediately; do not operate with the fixture open.
• Color temperature: This lamp is 3000K (Warm White). Confirm this matches the existing installation before partial relamping; mixing CCTs in adjacent fixtures produces visible color inconsistency.
• Allow a standard CMH hot restart cool-down interval (typically 5–10 minutes) following any power interruption before the arc re-ignites.

Safety and Handling Guidelines

• This lamp contains mercury; do not dispose of in municipal solid waste — recycle through a certified lamp recycling program in compliance with applicable federal, state, and local regulations
• UV radiation: This lamp emits UV radiation. The fixture must be enclosed with a UV-filtering lens at all times. A cracked, missing, or damaged lens must be replaced before operation resumes. Exposure to the unshielded lamp arc can cause serious skin burns and eye inflammation.
• Allow a full cool-down period after de-energizing before accessing the lamp; CMH lamps operate at extreme temperatures
• Do not handle the outer bulb with bare skin; oils from contact accelerate devitrification. Use clean cotton gloves or handle by the base; if contact occurs, clean with isopropyl alcohol before operation
• Allow a standard CMH hot restart cool-down interval before re-striking after a power interruption
• Confirm the G8.5 socket is rated for the maximum base temperature before installation; standard thermoplastic sockets are not suitable for CMH operating temperatures
• Check applicable state shipping regulations for mercury-containing lamps before ordering in quantity

Compliance

• ANSI M139 / C139 Certified (Pulse-Start CMH)
• Enclosed fixture with UV-filtering lens mandatory
• Contains mercury — subject to federal and state lamp disposal and recycling regulations
• RoHS compliance: verify with GE/Current if required for project specification

Ordering Information

• Order Code: 92585
• Ordering Description: CMH70/TC/830/G8.5
• ANSI: M139 / C139
• Base: G8.5 Bi-Pin (8.5mm) — for G12 socket equivalent, see GE 20016 (CMH70T/U/830/G12)
• Reported cross-references (unverified — confirm before substitution): Philips MasterColor CDM70/TC/830 G8.5; Sylvania MC70T4/U/G8.5/830; Osram HCI-TC 70W/830 WDL G8.5
• Note: UPC and pack quantity were not available in the source listing — contact ADL Supply to confirm before placing quantity orders

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.