What are the most lighting bulbs that can save power and environmentally friendly and have the most live time?

the LED bulbs , they have the least power consumption for the same lux and the longest life time , the only problem it costs a little more than other bulbs .

led lamps  are the most lighting bulbs that can save power and environmentally friendly and have the most live time

LED bulbs consume the least power and have the longest life span, lasting up to40 or50 years.
 This kind of bulb is both energy-efficient and environmentally friendly

Offcourse LED BULBS , it save more power , enviromentally friendly and have a long life than incandiscent, flourescent type  , by using it we can reduce up to80 % from electricity costs.

led lamp

well LED lights and CFL bulbs are more on demand nowadays because of their moe energy and electricty consumption. CFL are env. friendly but they costs little bit more than the ordinary bulbs cant be afford by every income level.

Long-lasting - LED bulbs last up to10 times as long as compact fluorescents, and far longer than typical incandescents.
Durable - since LEDs do not have a filament, they are not damaged under circumstances when a regular incandescent bulb would be broken.
Because they are solid, LED bulbs hold up well to jarring and bumping.
Cool - these bulbs do not cause heat build-up; LEDs produce3.4 btu's/hour, compared to85 for incandescent bulbs.
This also cuts down on air conditioning costs in the home.
Mercury-free - no mercury is used in the manufacturing of LEDs.
More efficient - LED light bulbs use only2-10 watts of electricity (1/3rd to1/30th of Incandescent or CFL) Small LED flashlight bulbs will extend battery life10 to15 times longer than with incandescent bulbs.
Also, because these bulbs last for years, energy is saved in maintenance and replacement costs.
For example, many cities in the US are replacing their incandescent traffic lights with LED arrays because the electricity costs can be reduced by80% or more

Solar light.is the better one. Because the function of solar bulb is observe the energy from sun light.when the sun rise then then solar pannel observe the energy and when the sun set then the bulb will lighting with the support of saved energy. It will save our money also...not pay any money in electricity office...