An illumination device utilizing a pulse modulation technique of a solid state light source to provide increased light output for a given heat load. In a preferred embodiment, power is supplied in pulses to periodically activate a short wavelength (i.e., blue) emitting LED, which in turn stimulates a...http://www.google.de/patents/US6028694?utm_source=gb-gplus-sharePatent US6028694 - Illumination device using pulse width modulation of a LED
