Philips 281188 1000 W BT56 EX39 107000 Lumen 3900 K 65 CRI Clear Metal Halide Lamp
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Manufacturer Signify Lamps
Mfg Catalog # 281188
Codale Part # 454478


  • Protective quartz shroud provides extra level of safety - shrouded arc tube for “O” open fixture rating.
  • No shut-off required- Ideal for 24-hours a day, 7-days a week operations (relamp fixtures at or before the end of rated life)
  • Extended eyelet mogul base will operate in both standard and exclusionary sockets.
  • Satisfies the 2005 NEC for use in open luminaires†
  • BT-56 base available in 1000 watts / ED-37 base available in 360 and 400 watts / ED 28 base available in 175 and 250 watts.
  • Relamp fixtures at or before end of rated average life. † The 2005 NEC states that luminaires that use a metal halide lamp shall be provided with either a containment barrier that encloses the lamp (historically referred to as an enclosed luminaire) or shall be provided with a means, typically a special lampholder, that will only accept ANSIType-O metal halide lamp. (Exception—this requirement will not apply to open luminaires with thick-glass parabolic reflector PAR lamps.) For more information regarding use ofType-O, S, and E metal halide systems, please refer to the NEMA white paper on this subject that is freely available at


  • Available in various bases and wattages.


  • Ideal for manufacturing facilities, retail establishments and warehouses.

Warning And Safety

  • WARNING: These lamps can cause serious skin burn and eye inflammation from short wave ultraviolet radiation if outer envelope of the lamp is broken or punctured. Do not use where people will remain for more than a few minutes unless adequate shielding or other safety precautions are used. Certain lamps that will automatically extinguish when the outer envelope is broken or punctured are commercially available." This lamp complies with FDA radiation performance standard 21 CFR subchapter J. (USA:21 CFR 1040.30 Canada: SOR/DORS/80-381)
  • Lamp contains mercury. Manage in Accord with Disposal Laws. See: or 1-800-555-0050


General Information

  • Operating Position: Base Up +/- 15 D [ Base Up +/- 15 D]
  • Main Application: General Lighting (G)
  • Life to 50% Failures (Nom): 12000 h
  • ANSI Code HID: M47/O

Light Technical

  • Color Code: 635 [ CCT of 3500K]
  • Luminous Flux (Rated) (Nom): 107000 lm
  • Color Designation: White (WH)
  • Design Mean Lumens: 69550 lm
  • Chromaticity Coordinate X (Nom): 405
  • Chromaticity Coordinate Y (Nom): 390
  • Correlated Color Temperature (Nom): 3500 K
  • Luminous Efficacy (rated) (Nom): 107 lm/W
  • Color Rendering Index (Nom): 65

Operating and Electrical

  • Lamp Current (Nom): 4.1 A
  • Ignition Supply Voltage (Min): 440 V
  • Re-Ignition Time (Min) (Max): 15 min
  • Ignition Time (Max): 120 s
  • Voltage (Nom): 263 V

Mechanical and Housing

  • Bulb Finish: Clear
  • Cap-Base Information: Nic/Brass
  • Bulb Material: Hard Glass

Approval and Application

  • Picogram Per Lumen Hour: 173.7 pg/lm.h
  • Mercury (Hg) Content (Nom): 150 mg


  • Pet (Niosh) (Nom): 59.9 h/500lx
  • Damage Factor D/fc (Nom): 0.70

Luminaire Design Requirements

  • Bulb Temperature (Max): 430 °C
  • Cap-Base Temperature (Max): 250 °C


UPC 4667728118
Codale Part No. 454478
Product Long Description An efficient, protected "O" rated lighting solution that is suitable for open-rated fixtures. Ideal for both indoor and outdoor applications.
Color Code 635 [CCT of 3500K]
Base Exclusionary Mogul Screw [Exclusionary Mogul Screw]
Color Temperature 3500 K
Family Brand Name Philips Lighting
Item Long Description Philips Lighting, Metal Halide, Protected "O" Rated Lamp, 1000W, Bulb: BT56, Base: Mogul Screw Exclusionary (E39), Lumens: 107,000, CRI: 65, Color Temp: 3900K, ANSI Code: M47/O. Color: Clear
MDM Pkg GTiN 00046677281182
Finish Clear
Color White
Voltage 263 Volt
Type Metal Halide
Diameter 177.8 mm
Material Ceramics Discharge Tube
Applications General Lighting
Bulb Type BT56
Wattage 1000 Watt
Color Temperature 3900 K
Lumens 110000 lm
Base Exclusionary Mogul Screw
Shape BT56
Average Rated Life 12000 hr
Bulb Shape BT56
Correlated Color Temp 3500 K
Color Coding 635
Color Rendering Index 65

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