LED Lighting: RGB vs UV/Blue + White/Yellow Phosphor
"...enables blue LEDs to be produced, and once you've got those to add to red and green ones, white light is possible and the LED light bulb could become reality."
Is the above extract correct?
Although it is certainly possible to purchase an RGB LED, such RGB LED light bulbs or similar RGB LED lighting strips seem to be more commonly sold as a accent lighting or novelty items. Based on what I've seen, most (virtually all?) LED lighting is based on LEDs using UV or Blue plus White or Yellow phosphor. Available as Warm or Cool coloured white light.
Am I correct on this point?