LED lights are the current technology, and with just a small amount of electrical energy can glow brightly. There is no filament to break, nor is there a colored layer to wear off. The LED itself emits light of a given color when a voltage is applied across it. What happens is there is an electron that is dislodged, and when another electron is captured by the semiconductor it emits a distinct frequency.
Since there is little current through an LED light, there is very little power used, but the brightness is unmatched for the energy needed to cause the glow.
Another advantage is LED light bulbs are long lasting. There is not much to burn out, and they do not fade.
When LEDs are used with solar technology the lights can add so much without doing environmental damage, while saving money.