Hand-held BTS256-LED is designed to measure luminous flux or illuminance, color data and spectral distribution of PC board mounted LEDs, discrete LEDs within a module, miniature lamps, endoscopes and any narrow beam emitting light source. Larger size light sources can be measured by either attaching tester to integrating sphere or by measuring illuminance using screw-on diffuser window. Device includes built-in 50mm diameter integrating sphere with interchangeable input optic nozzle designed to minimize positional error, auxiliary LED and GO Bi-Tech sensor. Priced at $4,900.