Product Overview
Philips MS400BUED28PS 400W 4000K Pulse Start Metal Halide Lamp
High-efficiency ED28 pulse start metal halide lamp with E39 mogul base, delivering 4000K cool white light, 68 CRI, and a 20,000-hour lifespan. Ideal for high-bay, commercial, and industrial lighting applications.
Specs
- Color Rendering Index: 68 CRI
- Average Rated Lifespan: 20,000 hours
- Base: E39 Mogul Screw
- ANSI Codes: M155/M128/M135/E
- Dimensions: 8-5/16" MOL x 3.5" Diameter
- Burn Position: Base-Up (±15° tolerance)
Key Features
- Enhanced Efficiency: 120 LPW luminous efficacy
- Fast Operation: 50% quicker warm-up/restrike compared to standard metal halide lamps
- Superior Output: 25% higher maintained lumens
- Durable Design: Rated for enclosed fixtures only
Applications
- High-Bay Warehouse Lighting
- Commercial Floodlighting Systems
- Industrial Facility Lighting
- Parking Structure Illumination
- Stadium and Arena Lighting
Safety & Compliance
Critical Safety Information:
- UV radiation risk if envelope compromised
- Requires FDA-compliant shielding (21 CFR 1040.30)
- Automatic shut-off models available
- Compliant with Canadian SOR/DORS/80-381 regulations
Must be used in enclosed fixtures with proper UV filtration
Product Advantages
- 50% longer lifespan than standard metal halide lamps
- 25% energy savings over switch-start equivalents
- Optimal 4000K cool white color temperature
- Pulse start technology for consistent performance
