OSRAM HTI 705 W/SE XS - HTI GY9.5 discharge lamp for stage lighting (700 W, 70 V, 5500 K)

OSRAM HTI 705 W/SE XS - HTI GY9.5 discharge lamp for stage lighting (700 W, 70 V, 5500 K)

The Osram HTI 705 W/SE XS is a single-ended metal halide lamp with a GY9.5 base, designed for professional stage lighting : concerts, clubs, theater, television/studio, and architainment solutions. It combines a high nominal luminous flux of 57,500 lm with a color temperature of 5,500 K and a CRI of 80 , providing a neutral white with good color rendering, ideal for sharp cuts, gobos, and color mixing in moving heads and spotlights designed for this format.

Its designation “705” refers to the family, although the nominal power is 700 W. It operates at 70 V and 10 A , with a cold start voltage of 2.5 kVp . The XS (eXtreme Seal) technology increases thermal resistance in the clamp/foil area, allowing it to withstand high operating temperatures; therefore, it requires forced cooling (ventilation) and exclusive use in enclosed luminaires with UV filtering. Its nominal lifespan is 500 hours , with a luminous efficacy of 85 lm/W and a luminance of 30,000 cd/cm² , resulting in a highly concentrated and bright beam.

In terms of dimensions, it offers a total length of 85 mm , a Light Center Length (LCL) of 39 mm , and a diameter of 24 mm , with an approximate weight of 18 g . The specified working position is p4 (horizontal, with the current belt facing downwards), and the cold electrode spacing is 4.0 mm. These characteristics ensure mechanical and photometric compatibility with equipment designed for HTI 700 W GY9.5 lamps.

Main features

• Type: HTI metal halide lamp, single-ended
• Base: GY9.5
• Rated power: 700 W (705 series)
• Rated voltage/current: 70 V / 10 A
• Ignition voltage (cold): 2.5 kVp
• Nominal luminous flux: 57,500 lm
• Color temperature: 5,500 K (neutral white)
• Color Rendering Index (CRI): Ra 80
• Luminous efficacy: 85 lm/W
• Luminance: 30,000 cd/cm²
• XS Technology: eXtreme Seal for greater thermal resistance in the clamp area
• Cooling: Forced (fan)
• Nominal lifespan: 500 h
• Dimensions: Length 85 mm; LCL 39 mm; diameter 24 mm
• Working position: p4 (horizontal, current belt down)
• Use: Only in enclosed luminaires with UV filtering

Product benefits

• Very bright and concentrated beam thanks to its high luminance, ideal for gobo projection and defined effects.
• Color stable at 5,500 K with CRI 80: natural tones on skin and scenery under cameras and live.
• Standardized GY9.5 and 39mm LCL format for easy integration into compatible devices.
• Professional performance/consistency : 85 lm/W and stable specifications under correct operating conditions.
• XS technology that withstands higher thermal demands in high-performance luminaires.

Use cases

• Concerts and tours : crisp projection on moving heads and 700W profiles prepared for HTI.
• Theatre and musical : neutral whites that balance saturations and skin tones.
• Club and corporate events : luminous punch for aerial effects and gobo textures.
• TV/studio and architainment : chromatic consistency and high intensity in compatible luminaires.

Frequently Asked Questions

• Is it “705 W” or 700 W? The commercial designation is 705 , but the nominal power is 700 W.
• Does it need a ballast and igniter? Yes. It requires control equipment compatible with 700 W/70 V and a 2.5 kVp (cold start ) capacity, plus forced ventilation according to the luminaire manufacturer's specifications.
• Can it be used in open luminaires? No. For safety reasons, its use is mandatory in enclosed luminaires with UV filtering.
• What is the working position? p4 (horizontal, with the power belt facing down), unless otherwise specified by the appliance manufacturer.

Safe installation and handling

• Disconnect the equipment and allow it to cool before handling. Use clean gloves or a chamois cloth to avoid contaminating the bulb.
• Check ballast/igniter compatibility, p4 orientation, and forced cooling .
• Respect the light center length (LCL) of 39 mm when mounting.
• In case of breakage, ventilate the area and follow the manufacturer's safety procedures and local regulations.

Project description

Osram HTI 705 W/SE XS lamp, metal halide, GY9.5 base; rated power 700 W; voltage 70 V; current 10 A; ignition (cold) 2.5 kVp; luminous flux 57,500 lm; 5,500 K; CRI Ra 80; efficacy 85 lm/W; luminance 30,000 cd/cm²; LCL 39 mm; length 85 mm; diameter 24 mm; weight 18 g; working position p4 (horizontal, current belt down); forced cooling; use in closed luminaires with UV filtering; rated lifetime 500 h.