Often misunderstood, there are finite limits regarding how much light can be produced with a given amount of electrical power. Knowledge of these limits yield insights into LED luminary and LCD backlight design with the ultimate goal of developing both a functional and optimal first pass prototype.
Achieving an optimal design may involve investment in higher efficacy LEDs, improved switching regulator design, and/or compromises to the industrial design. Optimal designs feature reduced heatsink size, and minimal heat output which yield a more desirable industrial design while sipping a bare minimum of electrical power.
An excel spreadsheet contains graphs, calculated data, and visual basic code used to calculate maximum efficacies across the CIE 1931 and 1964 loci. The included excel/VBA code also generates maximum efficacy figures for all points on the CIE loci and stores them in a separate excel spreadsheet.