LED has a powerful energy lighting levels of up to 70 lumens / watt than incandescent electric coil is effective at 15 lumens / watt, even in the lighting of the LED current to lower the lamp. Fluorescent form cents, which is effective up to 80-100 lumens / watt light bulb However, Fluorescent and cents is spread out in all directions. Wasted a lot The LED light will shine in front u3648 only.