Patent ID: 7450028

Claim:
A dental LED operation light, comprising: at least two power sources (PW), at least one which is an adjustable power source(ADJ-PW), and at least two LED component units (LG) for emitting light in response to power received from a power source (PW), which LED component units (LG) comprise at least one LED component (LED) and which LED components (LED) have been arranged to produce color components of light emission of said LED operation light at two different wavelengths at least, wherein at least two of said LED components (LED) emit light of at least two different shades of white, and wherein said LED operation light additionally comprises: at least one measuring means (MM) i. for measuring the color temperature of the light emission produced by said LED component units (LG), ii. for measuring light reflected from a surface, or iii. for measuring at least one magnitude generated by the LED component units (LG) that has a known correlation to the color temperature of the light emission produced by said LED component units (LG), and at least one control means (CM) for generating control information for at least one of said adjustable power sources (ADJ-PW) in response to measurement data received from said measuring means (MM) to control production of at least one color component in at least one LED component (LED) to maintain a constant or desired color temperature.