The 66877 Series Q QTH Source comes with everything you need to begin operation. It includes a 60000 lamp housing with one condenser, rear reflector, and X, Y, Z lamp position adjusters, a 68938 or an OPS-Q250, your choice of lamp and appropriate lamp socket adapter (specify lamp when ordering), and all necessary cables and mounting hardware. This version uses a F/2.2 UV Grade Fused Silica condenser for a 1.3 inch (33 mm) diameter collimated output beam at the 1.5 Inch Series flange. The included 60000 Lamp Housing is a versatile, protective enclosure for low wattage QTH lamps. External, high resolution controls allow ±0.13 inch (±3.3 mm) lamp adjustment in the X, Y and Z directions. We include one condenser and one rear reflector to collect the lamp's back radiation. You can replace the reflector assembly with a second condenser for the simultaneous illumination of two samples. The 68938 and an OPS-Q250 are highly regulated Power Supplies. These power supplies maintain a stable lamp output and minimize light ripple.