Product Overview
GE 20016 70W Ceramic Metal Halide Lamp - G12 Base - 3000K - ANSI M139
The GE 20016 Pulsearc Ceramic Metal Halide (CMH) lamp delivers 6,200 lumens of high-quality 3000K warm white light with 83 CRI color rendering. Featuring a G12 bi-pin base and T6 tubular design, this 70W CMH lamp is ideal for retail display lighting, commercial downlights, and architectural accent applications. With a 15,000-hour rated life and compatibility with ANSI M139/M85 electronic ballasts, it offers superior color stability and energy efficiency compared to traditional metal halide and halogen alternatives.
Technical Specifications - GE 20016 CMH 70W
Electrical
| Manufacturer Part Number | 20016 |
|---|---|
| Wattage | 70 Watts |
| Lamp Operating Voltage | 90 Volts (Nominal) |
| Base Type | G12 (Bi-Pin Ceramic) |
| ANSI Ballast Codes | M139 / M85 / C139 (Pulse Start) |
| Starting Pulse | 3.5-5.0 kV (Provided by ballast) |
Performance
| Color Temperature | 3000K (Warm White) |
|---|---|
| Color Rendering Index (CRI) | 83 (Very Good) |
| Initial Lumens | 6,200 lm |
| Efficacy | 88.6 Lumens per Watt |
| Rated Life | 15,000 Hours (L70, 50% survival) |
| Warm-up Time | 2-4 minutes to full brightness |
Physical
| Bulb Shape | T6 (Tubular Clear) |
|---|---|
| Maximum Overall Length (MOL) | 3.56 inches (90.4mm) |
| Bulb Diameter | 0.86 inches (T6 - 21.8mm) |
| Light Center Length (LCL) | 30mm ± 2mm (1.18 inches) |
| Weight | 0.5 lbs (227g) |
| Burning Position | Universal (±90° from base up) |
Compatible Ballast Systems - ANSI M139/M85 Required
⚠️ Critical: This lamp requires ANSI M139 or M85 rated pulse start ballasts. Operating with incorrect ballasts will cause immediate failure, reduced life, and potential safety hazards. Operating voltage is 90V (supplied by ballast from 120-277V line).
GE Recommended Ballasts:
- GE UltraMax: GEMH70-SLJ (electronic multi-volt)
- GE Magnetic: GEMH70-ML (CWA/RWA type)
- GE Pulse Start: C139/M139 compatible series
Third-Party Compatible Ballasts:
- Philips Advance: Xitanium 70W CMH electronic ballasts (M139)
- Osram: PT-FIT 70/220-240 I (M85 European equivalent)
- Sylvania: Quicktronic QTP6C70 (M139 rated)
- Universal Lighting: UC70-M-V (M139 multi-volt)
CMH vs Traditional HID: Performance Analysis
| Specification | GE 70W CMH (This Lamp) | 70W Standard Metal Halide | 75W Halogen PAR | 175W Mercury Vapor |
|---|---|---|---|---|
| Lumen Output | 6,200 lm | 5,800 lm | 1,100 lm | 8,000 lm |
| Efficacy (LPW) | 88.6 | 82.9 | 14.7 | 45.7 |
| CRI | 83 | 65 | 100 | 22 |
| Color Stability | Excellent (3000K constant) | Poor (shifts to green) | Perfect | Poor (blue-green) |
| Lamp Life | 15,000 hrs | 10,000 hrs | 3,000 hrs | 24,000 hrs |
| Best Application | Retail/Display (color critical) | General industrial | Accent/residential | Street/security only |
Advantage: Ceramic Metal Halide provides the best balance of color quality (83 CRI), efficiency (88 LPW), and life (15,000 hrs) for commercial display lighting.
Professional Applications for G12 CMH
Retail & Display
- Track Lighting: G12 base fits standard commercial track heads
- Display Cases: 83 CRI accurately renders merchandise colors
- Jewelry Stores: 3000K warm white enhances gold and gem appearance
- Apparel Boutiques: Consistent color temperature prevents fabric color shift
- Gallery Lighting: Better color rendering than standard MH
Commercial & Hospitality
- Downlights: Compact T6 size fits 4-5 inch recessed cans
- Hotel Lobbies: 15,000-hour life reduces high-ceiling maintenance
- Restaurant Accent: 3000K creates warm, inviting atmosphere
- Museum Lighting: UV-protected envelope safe for artifacts
- Reception Areas: High efficacy reduces operating costs
Industrial & Security
- High-Bay Supplemental: Accent lighting in warehouses
- Security Perimeter: Better color identification than HPS
- Loading Docks: Instant restrike with pulse start ballasts
- Parking Structures: 3000K provides welcoming ambiance
Compatible Replacements & Industry Equivalents
This GE 20016 (G12 base, 70W, 3000K) is electrically and mechanically compatible with:
- Philips MasterColor: CDM-T 70W/830 G12
- Philips: CDM-T6 70W/830 (T6 shape)
- Osram Powerstar: HCI-T 70W/830 WDL G12
- Osram: HCI-T6 70/830 WDL (T6 tubular)
- Sylvania Metalarc: MC70T6/U/G12/830
- Ushio: UM70/G12/TC/830
- Plusrite: CMH70/T/G12/830
- ILCOS Code: MT/UB-70/30/1B-H/E-G12-13/57
Safety Information & Compliance
⚠️ UV Radiation & Enclosed Fixtures
UV-Protected Quartz: While this lamp has UV-blocking quartz, it must still be used in fully enclosed fixtures rated for Ceramic Metal Halide. The UV protection reduces but does not eliminate ultraviolet emission.
- Never operate in open fixtures
- Not for residential living spaces with prolonged exposure
- Fixture must provide mechanical containment
- Replace immediately if outer envelope is cracked
? Thermal Management
- Maximum Base Temperature: 250°C (482°F)
- Maximum Bulb Temperature: 400°C (752°F)
- Allow 15-minute cool-down before handling
- Maintain minimum clearances per fixture specification
- Use only high-temperature rated sockets (ceramic/porcelain)
? Certifications
- ANSI: M139 / M85 / M98 / C139 compliant
- UL: 1029 Listed for HID lamps
- RoHS: Compliant (reduced mercury)
- Origin: Hungary (EU manufacturing)
- Recycling: EPA-compliant disposal required
- UPC: 043168200165
Installation Requirements
- Fixture: Enclosed luminaire rated for 70W HID, G12 base
- Ballast: ANSI M139 or M85 rated, pulse start capability
- Socket: G12 bi-pin ceramic socket (high temp rated)
- Wiring: Max voltage rise 5V from ballast to lamp
- Clearance: Minimum 3 inches from combustibles
- Professional: Installation by qualified electrician recommended
- Orientation: Universal burning position (any angle)
Frequently Asked Questions
What is the difference between G12 and G8.5 bases?
The G12 base (used in this GE 20016) has 12mm pin spacing and is the industry standard for 35W-150W CMH and metal halide lamps. G8.5 has 8.5mm spacing and is for lower wattage (20W-39W) lamps. These bases are not interchangeable - verify your fixture socket before ordering. G12 is common in commercial track and downlight fixtures.
Can I use a 70W CMH in a 39W fixture?
No. While both may use G12 bases, 70W and 39W lamps require different ballasts (ANSI M139/M85 vs M81). A 70W lamp in a 39W ballast will receive insufficient power and may not start or will operate at reduced output. Conversely, a 39W lamp in a 70W ballast will be overdriven and fail catastrophically. Always match lamp wattage to ballast rating.
Why does my CMH lamp flicker or not start?
Common causes: (1) End of life - 15,000 hours reached. (2) Wrong ballast - verify ANSI M139/M85 rating; standard MH ballasts won't work. (3) High voltage drop - keep wiring runs short (max 5V drop). (4) Cold temperature - CMH starts poorly below -20°C. (5) Damaged socket - G12 pins require firm contact in ceramic socket.
Is 83 CRI good enough for retail lighting?
Yes, 83 CRI is considered very good for general retail and commercial lighting (80+ is the threshold for "good" color rendering). While 90+ CRI is preferred for art galleries and high-end jewelry, 83 CRI provides accurate color perception for apparel, general merchandise, and hospitality applications at a lower cost than premium CMH or LED alternatives.
What does "Constant Color" mean for CMH lamps?
GE's Constant Color technology uses a ceramic discharge tube (polycrystalline alumina) instead of quartz. This maintains stable chemical composition throughout the 15,000-hour life, preventing the color shift (toward green/blue) common in standard quartz metal halide lamps. The 3000K warm white color temperature remains consistent from installation to end-of-life, crucial for retail environments where color consistency affects sales.
