If every American home replaced just one light with a light that has earned the ENERGY STAR, we would save enough energy to light 3 million homes for a year, save about $600 million in annual energy costs, and prevent 9 billion pounds of greenhouse gas emissions per year, equivalent to those from about 800,000 cars.

Earning the ENERGY STAR means products meet strict energy efficiency guidelines set by the US Environmental Protection Agency. Lighting products that have earned the ENERGY STAR deliver exceptional features, while using less energy. Saving energy helps you save money on utility bills and protect the environment by reducing greenhouse gas emissions in the fight against climate change. Many of our products are Energy Star Qualified, please look for a ENERGY STAR logo on the qualified products.

An ENERGY STAR Qualified Compact Fluorescent Light bulb (CFL):

  • can save more than $40 in electricity costs over its lifetime
  • uses about 75% less energy than standard incandescent bulbs and lasts up to 10 times longer
  • produces about 75% less heat, so it is safer to operate and can cut energy costs associated with home cooling

CFLs have two main components: a gas-filled tube (also called bulb or burner) and a magnetic or electronic ballast. Standard shapes of CFL tube are single-turn double helix, double-turn, triple-turn, quad-turn, circular, and butterfly.

Electronic ballasts contain a small circuit board with rectifiers, a filter capacitor and usually two switching transistors connected as a high-frequency resonant series DC to AC inverter. The resulting high frequency, around 40 kHz or higher, is applied to the lamp tube. Since the resonant converter tends to stabilize lamp current (and light produced) over a range of input voltages, standard CFLs do not respond well in dimming applications and special lamps are required for dimming service. CFLs that flicker when they start have magnetic ballasts; CFLs with electronic ballasts are now much more common.

Since CFL bulbs are created to substitute power hungry incadescent, Neptun Light creates them with many common bases: