kelvin temperature scale chart gradient. kelvin scale education led color hot cold cool warm spectrum.

kelvin temperature scale chart education led color gradient hot cold cool warm light colour radiation spectrum blackbody white interior lamp natural 6500 warmer bulb 3000k heat gradation design day spotlight 5000 blue 3000 halogen source 6000 physics incandescent candle sky bright 10000 saving sodium yellow 7000 metal abstract halide