Compact fluorescent light bulbs contain mercury however LED lightbulbs do not and the LED light bulbs are more energy efficient. If you also take into consideration that Compact Fluorescent bulbs tend to go out long before the product life cycle promised you will begin to see that LED is the way to go. LED is better for the environment, your pocket book, and they use hardly any energy.
The brightness of an LED light bulb is not the same as other lights but has a much smoother yet intense flare. It is comfortable to the eye and allows you to see without hinderance. I use LED lights and would recommend them to anyone. This new light will eventually take over as the preferred method of lighting. It may take a few years to catch but it is the way to go.