LED’s use less power and have “whiter” light. CFL’s are brighter, but use more power. I use Compact Florescent Lighting in some areas of the house that I need more light, and LED’s places where I want to save on power.
You can get Day Light Spectrum bulbs in CFL. But not at some of the lower wattages.
The bulb I tested the CFL was 4800k.
The LED was 6300k
Daylight is 6700k in most cases.
This is how the LED bulbs work. A light-emitting diode is forward-biased (switched on),so electrons are able to come back together with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence. The color of the light (corresponding to the energy of the photon) is made by the energy gap of the semiconductor. LEDs are often small in area, and integrated optical components may be used to shape its radiation pattern.LEDs have many advantages over incandescent light sources including lower energy consumption, longer life, improved robustness, smaller size, and faster switching. The LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent sources of comparable output.
Compact florescent lights use one-fifth to one-third the electric power, and last eight to fifteen times longer. A down side is that CFLs contain mercury, which complicates their disposal. It radiates a spectral power distribution that is different from incandescent lamps. There is improved phosphor formulations that improve the color of the light emitted.