Product Overview
GE 29485 CMH20PAR20/SP 20W Ceramic Metal Halide PAR20 Spot Lamp - 3000K 8° Beam E26 Base
The GE 29485 CMH20PAR20/SP is a 20-watt ConstantColor ceramic metal halide PAR20 spot lamp featuring a protected arc tube, E26 medium screw base, and precise 8° beam angle. Delivering 1,000 lumens of 3000K warm white light with 81 CRI and exceptional 13,000 candela center beam intensity, this lamp offers 12,000-hour rated life with 96% lumen maintenance. Designed for open or enclosed fixtures with universal burning position.
Key Specifications
- Product Code: 29485 (NAED)
- Ordering Code: CMH20PAR20/SP
- Wattage: 20W
- Base Type: E26 Medium Screw (Open Rated)
- Bulb Shape: PAR20 (2.5" diameter)
- Beam Angle: 8° Spotlight (SP)
- Center Beam Candlepower (CBCP): 13,000 cd
- Color Temperature: 3000K (830 Code) Warm White
- Color Rendering Index (CRI): 81
- Initial Lumens: 1,000 lm
- Lumen Maintenance: 96% at 12,000 hours
- Rated Life: 12,000 hours
- Maximum Overall Length (MOL): 3.67" (93mm)
- Diameter: 2.5" (64mm)
- ANSI Code: M156/O (20W CMH)
- Operating Position: Universal
- Arc Tube: Protected (Open Fixture Rated)
- Start Method: Pulse Start
- Case Quantity: 15 per case
- UPC: 043168294850
Compatible Ballasts for CMH20PAR20/SP
Requires ANSI M156 ballast. This is NOT a line-voltage lamp - requires specific HID ballast:
- GE #63042 GEMH20-MSJ-MV
- GE #63043 GEMH20-MSF-MV
- Any ANSI M156 compatible 20W CMH electronic ballast
⚠️ Critical: Do NOT use with standard 120V socket. Requires M156 ballast system. Using without proper ballast will destroy lamp and create safety hazards.
ConstantColor CMH Advantages
- Protected arc tube design - safe for open or enclosed fixtures
- UV Control technology with UV-filter reflector
- 96% lumen maintenance at 12,000 hours
- Excellent color rendering with enriched reds (81 CRI)
- High 13,000 CBCP intensity for punch-through lighting
- 20% more efficient than quartz metal halide
- 4-5× longer life than halogen PAR20 lamps
- Universal burning position (any orientation)
- ConstantColor technology for lamp-to-lamp consistency
- Direct retrofit for 50W-75W halogen PAR20 spots
Commercial Lighting Applications
- Retail Display and Accent Lighting
- Museum & Gallery Spotlighting
- Hotel Lobby and Reception Areas
- Architectural Accent Lighting
- Track Lighting Systems
- Display Case Illumination
- Merchandise Highlighting
8° Spotlight Beam Characteristics
- Tight beam control: 8-degree spot for precise highlighting
- High intensity: 13,000 candela center beam
- Best for: Long-distance accent, spot lighting, feature highlighting
- Coverage at 10 feet: ~1.4-foot diameter pool
Safety & Handling Instructions
⚠️ Burn Hazard
- Allow lamp to cool before handling (operates at high temperature)
- Do not turn on until fully installed
- Lamp may shatter if broken - handle with care
- Do not use if outer glass is scratched or broken
⚡ Electric Shock & Fire Risk
- Do not use where directly exposed to water without enclosed fixture
- Turn power off before inspection, installation or removal
- Keep combustible materials away from lamp
- Use only with fused or thermally protected M156 ballast
? Lamp Rupture Warning
- Do not exceed rated voltage (ballast-provided)
- Do not store flammable materials near lamp
- Do not use beyond rated life (12,000 hours)
- Use only properly rated ANSI M156 ballast
Alternate Part Numbers & Cross References
Also known as: GE 29485, CMH20PAR20/SP, CMH20/PAR20/SP/830
Related: GE 29486 (Flood/FL version, 25° beam, 3,750 CBCP)
Cross Reference: Philips CDM20/PAR20/M/SP/830, Plusrite CMH20PAR20/SP/830
