Philips MSR Platinum 35 Lamp for the Terbly PT800S is a 800 watt replacement bulb.

Terbly PT800S Specifications:

• Technology: High-intensity discharge
• Type: Metal Halide
• Watts: 800W
• Ends: Single-ended
• Overall Length: 116mm
• Diameter: 24mm
• Burning Position: Universal
• Arc Length: 3.0mm
• Initial Lumens: 57,800
• CC Temp: 7,750 K 
• CRI: 75
• Life: 1000 hours
• Reflector: N/A
• Working Distance: N/A
• Pinch Temp: 450°C

This bulb works in many applications including the following: 

Clay Paky Alpha Profile 800 ST, Clay Paky Alpha Spot QWO ST, Terbly PT800S Pro, Elation Platinum Spot 35 Pro, Fine Art Fine 800SF, PR Lighting XR 800 Spot, Robe MMX Spot , Robe MMX Wash Beam , Terbly FS800M Follow Spot, Terbly PT800S, Terbly PT800P, Triton Blue 35R-SPOT, Vari Lite VL880