One thing to consider when going to LED lighting (or fluorescents for that matter) is color temperature. The soft-white (2400-3000K) LED bulbs do a good job of mimicking an incandescent bulb, while the cool white and daylight ones (5000-7000K) don't.
There is an important distinction to be made here. Color temperature is only a property of incandescent lamps. LED and florescent lamps do not have a color temperature. The numbers quoted above for LEDs are actually correlated color temperatures. The correlated color temperature is essentially the color temperature of an incandescent source which would produce the same visual effect as when the LED illuminates a theoretical white surface. Illumination of any other surface can produce very different color sensations.
Incandescent lamps and sunlight have a pretty much continuous spectrum. The output of LEDs and florescent lamps is in discreet bands. There are some florescent lamps such Blue Max which do a pretty good job of mimicking incandescent sources. The measure to look for here is color rendering index (CRI). The closer to 100 a CRI value is the better the source approximates the effect of an incandescent lamp.
I haven't found a white LED I would use for illumination. I find the light harsh and difficult to read with. I dread having them as my only source of light.