Mercury and CFLs (Compact Fluorescent Bulbs)

Why should people use CFLs? Switching from traditional light bulbs (called incandescent) to CFLs is an effective, simple change everyone in America can make right now. Making this change will help to use less electricity at home and prevent greenhouse gas emissions that lead to global climate change. Lighting accounts for close to 20 percent […]

When Are Photovoltaic Systems Appropriate?

People select PV systems for a variety of reasons. Some common reasons for selecting a PV system include: Cost—When the cost is high for extending the utility power line or using another electricity-generating system in a remote location, a PV system is often the most cost-effective source of electricity. Reliability—PV modules have no moving parts […]

Types of Lighting

Part 3 of Energy-Efficient Lighting. There are four basic types of lighting: incandescent, fluorescent, high-intensity discharge,and low-pressure sodium. Incandescent lighting is the most common type of lighting used in residences. Fluorescent lighting is used primarily in commercial indoor lighting systems, while high-intensity discharge lighting is used only for outdoor lighting applications. Low-pressure sodium lighting is used where […]