The main types of bulbs are incandescent and fluorescent. Incandescent lights work by heating a thin strip of metal unit until it glows. Fluorescent lights electrically excite a gas, which then causes a phosphorescent coating to glow. Different types of lights can produce different colors a great way to find the correct color that you want is to look at the CRI which is the color rendering index. The best bulbs usually score between 95-100 and the worst around 52. Fluorescents light bulbs render a bluish tint, tungsten incandescent light bulbs render a yellow tint, and halogen light bulbs render a pink tint.
The best type of lighting to buy is the compact fluorescent, 2nd is the tungsten incandescent, and 3rd is the halogen. The CFL (compact fluorescent light bulb) uses about 75% less energy than standard incandescent bulbs and lasts up to 10 times longer. It also produces 75% less heat. Also always look for the ENERGY STAR approval. This means a product has met strict energy efficiency guidelines set by the US environmental protection agency. They initially use less energy and these products reduce greenhouse gas emissions in the fight against climate change.