NEW Ushio HPL 550W Lamp, 550W/77V, 300 Hour (Case of 10)

The NEW Ushio HPL 550W Lamp (HPL-550/77V+, 550W/77V, 300 hour) is a high-performance halogen replacement lamp engineered for ETC Source Four fixtures. The redesigned, ultra-compact filament geometry improves optical efficiency to produce up to 20% more fixture lumens, delivering noticeably higher output from the same fixture compared to the old lamp design.

Performance for ETC Source Four Fixtures

Built on the USHIO HPL+ platform, this lamp is designed for high-output stage and studio use where consistent brightness, clean beam quality, and predictable lamp life matter. With a 3250K color temperature and 16,170 initial lumens, it helps maintain a bright, neutral-white look that blends well across a rig when matching like-for-like lamps.

Key Technical Details

This model is rated at 550W and 77V, uses an HT/SNK base, and supports any burn position for flexible installation and focusing orientations. It features a clear T6 bulb with a 4-C8 filament, no front glass cover, and a 300-hour rated life to balance output and maintenance intervals.

Specs at a Glance

• Series / ANSI: HPL, HPL-550/77V+
• Cross reference: JS77V-550WC
• Type: Halogen
• Wattage / Voltage: 550W / 77V
• Color temperature: 3250K
• Luminous flux (initial): 16,170 lm
• Efficacy: 29.4 lm/W
• Bulb finish / shape: Clear / T6
• Burn position: Any
• Dimensions: 18.35 mm diameter, 104 mm MOL, 60.3 mm LCL
• Weight: 0.18 lbs (each)

Supplied as a case of 10 lamps for venues, rental houses, and production teams that standardize lamping across multiple fixtures and want fewer interruptions for changeouts.