Since more than 100 years we have electric lighting. Incandescent bulbs were the first and are still used in many lamps, especially in our homes.Their light has a spectrum similar to natural sun light, and is comfortable to the eyes. There are non-expensive dimming solutions widely available in the market.
The latest development are the halogen lamps, especially used as spot lights.



For work places fluorescent tubes have taken over during the last 50 years; they carry the bulk of lighting for public buildings, offices, factories and warehouses.
Despite their
environmental problems, and their uncomfortable light, these lamps are the first choice when looking for economic work place lighting.





While the incandescent lights are being phased out because of low efficiency, the compact fluorescent lamps (CFL) gain the market. However, they come with the same problems as the fluorescent tubes.
So, CFLs are not really a suitable replacement for incandescent lamps.


The solution comes with a new technology which has grown up during the recent years:  Solid State or LED Lighting
LEDs avoid all the environmental problems, their light can be comparable to incandescent lamps, and their efficency beats the fluorescent lamps by far. The prices for lighting LEDs are still rather high, but the advantages justify the price. Because of their low energy consumption, even an economic advantage can be calculated, try this calculator of Ledzworld.


On the long run there is no alternative to LED Lighting.
The US Department Of Energy (DOE) has recognized the problem, and - on big scale - supports solid state lighting.