LMS-650 Lamp Measurement Sphere has a 65" diameter integrating sphere mounted on a hinged frame equipped with rugged locking casters to allow the sphere to be rolled and locked into position. The dual, rail-mounted configuration of the two hemispheres allows the sphere to be opened and closed easily to change lamps or perform a measurement. The sphere contains a lamp mounting bracket designed to accept a variety of sockets for single contact and double contact lamps. The sphere is designed for measurement of medium to large lamps with a maximum length of 48", and a maximum lamp wattage up to 4000W. The sphere interior is coated with Spectraflect, a diffuse white reflectance coating specifically formulated for lamp measurement spheres. An 80% reflectance coating is available for spheres used in photopically filtered applications. The integrating sphere design conforms to recommendations of CIE Publication 84, providing an easy-to-operate, highly accurate measurement system. An electrical feed-through to connect the lamp to a power supply terminates at the lamp socket mounting plate in the sphere. The sphere is equipped with a cosine collector sphere assembly that consists of a 3 " diameter sphere with a ½ " diameter detector port. The assembly adapts to the measurement port of the sphere and offers a wide field-of-view, necessary for accurate total flux measurements.

Light Collection Efficiency Of Integrating Sphere
An approximate method to calculate the efficiency of an integrating sphere in preserving light generated within is: % of Light Power reaching output port at all angles = 12 x area of output port / surface area of sphere x 100%
This assumes you can collect all light from all angles as normally you would then have to ratio the solid angle of collection to the light collected at all angles as well. If you are calculating the light that gets collected into a detector or monochromator, use the area of the detector or monochromator slit and not the actual output port area.