Good question especially now since LED bulbs are taking over most every facet of lighting. Pyrroc is correct. There are LED bulbs now that require no ballast, in fact, if there is a ballast, you must either bypass it altogether or remove it.
Vasa (or Wasa) is a retired Swedish warship built between 1626 and 1628. The ship foundered after sailing about 1,300 m (1,400 yd) into its maiden voyage on 10 August 1628. It fell into obscurity after most of her valuable bronze cannons were salvaged in the 17th century until she was located again in the late 1950s in a busy shipping lane just outside the Stockholm harbor.
Below are Contact Addresses of top Construction companies that are playing key role when it comes to infrastructure development in Nigeria. These companies are mostly involved in the setup of road, building, electrical,mechanical and water projects. >> Achimore Nigeria Limited Building, Civil Engineering, Erosion & Environmental Controls, Highway Construction and Ancillary Services Company.
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.