How to find the right High Intensity Discharge Bulbs AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in High Intensity Discharge Bulbs
- Lamp type matches ballast
- Metal halide, high-pressure sodium and mercury vapor lamps each need their own ballast, matched by wattage and ANSI code (M-codes for metal halide, S-codes for HPS) Wrong ballasts cause no-start, short life or lamp failure.
- Pulse-start vs probe-start
- Metal halide lamps must match the ballast's starting method The two starting methods are not interchangeable.
- Open vs enclosed fixture rating
- Use O-rated (protected) metal halide lamps in fixtures without a lens Metal halide arc tubes can rupture at end of life.
- Base and burning position
- Match the base (often E39 mogul) and any base-up, base-down or horizontal restriction Wrong orientation reduces output and life.
Brands that matter
- Philips: Broad metal halide and HPS range.
- Sylvania (Ledvance): Metalarc and Lumalux HID lamps.
- GE: Long-standing HID lamp maker.
- Venture Lighting: Metal halide specialist.
- Ushio: Replacement HID and specialty lamps.
What to avoid
- Mixing HPS lamps into metal halide fixtures or the reverse
- Unprotected metal halide lamps in open fixtures
- Relamping indoor fixtures with HID when an LED retrofit fits the use better