Spectra, a light engine launched by Lumencor Inc., provides seven discrete solid-state outputs spanning the visible spectrum from 380 to 680 nm, making it a true arc lamp replacement. For use by microscopists, researchers and OEMs, it features more power per band for each channel than did previous models. It offers a streamlined design, full electronic control of intensity, switching speeds in the tens of microseconds and a dosimeter option. Adapters for all major microscopes are available, and custom adapters are available upon request. Custom optical design services also are offered.