IMHO this looks to be just another Lightpanel that uses White Phosphor LEDs. As such it suffers the inherent color rendering limitations of all White Phosphor LED panels using remote phosphor technology to generate colors with longer wavelengths. If you compare the color output of Phosphor White LEDs, they in no way resemble that of a true black body radiator like a Tungsten filament. As Guy Holt demonstrates in his excellent article on LED lights, the inherent limitation to the “Stokes shift” process by which a portion of a “pump” color is transformed from shorter wavelengths to longer wavelengths in Remote Phosphor LEDs is that it works in only one direction – that is why Remote Phosphor LEDs don’t emit color wavelengths shorter than their pump color. Another, inherent shortcoming to this approach to generating “tungsten” light from an LED is that there is a tradeoff between lumen output and warmer color temperatures. Compared to a black body radiator source like a Tungsten filament, the output of White Phosphor LEDs drops off steeply below its pump color (which is at 425nm verses 465nm of the Blue LED used in typical Phosphor White LEDs) so that it puts out no wavelengths below 400nm. By comparison a Tungsten filament continues to generate light with wavelengths well below 400nm which is why tungsten light will render violet colors better. Another inherent shortcoming to White Phosphor LEDs is that they don’t put out much light in the medium blue-cyan-turquoise range from about 465-510nm and long-wavelength colors cutoff at about 625 nm where a tungsten filament continues to generate light all the way out. Because of this rapid drop off of wavelengths above 625nm, pinks, reds, oranges, and other long wave-length colors look dull under White Phosphor LED light, compared with how they look under a Tungsten source which continues strong all the way out on the long-wavelength end. Use this link to see the effect that the discontinuous color output of Phosphor White LEDs has on the color rendering capability of imaging system exposed with them.And, as Michael Morian clearly demonstrates on his excellent website - http://talltalepictures.com/blog/2011/12/06/are-led-1x1-panels-ready-for-prime-time/ - you can’t use color gels to correct for these color deficiencies of White Phoshpor LEDs. Because of their discontinuous color output, color gels have unexpected and undesirable consequences when used on White Phosphor LEDs. Peter Berger
