Patent ID: 8550657

Claim:
A methodology for maintaining lighting of the white colour at an intended correlated colour temperature (CCT), the steps comprising: i. combining any three different groups of light emitting diodes (LEDs) attached on a LED plate, the three different groups selected from the groups consisting of: a plurality of amber LEDs with DWL range of 585 nm to 595 nm, a plurality of warm-white LEDs with CCT range of 2500K to 3700K, a plurality of white LEDs with CCT range of 3700K to 5000K and a plurality of cool white LEDs CCT range of 5000K to 7000K to emit light beams without combining the light beams through a condenser lens; ii. providing a reflecting means which the three different groups of LEDs face and are spaced from, the reflecting means transmitting a portion of the light beams and reflecting a portion of the light beams; iii. providing a sensory means arranged behind the LEDs to measure the CCT of the reflected light beams reflected from the reflecting means and convert the measured CCT reading to CCT binary data; and iv. providing processing means to compare the CCT binary data against the intended CCT binary data and instruct the LEDs to adjust the CCT of the light beams until the intended CCT is obtained.