Understanding Lighting Principles and Terms – To choose the best energy-efficient lighting options for your home or business, understand basic lighting principles and terms.
Indoor Lighting Design – When designing indoor lighting for energy efficiency, consider some basic design principles and methods.
Outdoor Lighting Design – When designing outdoor lighting, consider the purpose of the lighting along with the basic methods for achieving energy efficiency.
Fluorescent Lighting – Fluorescent lamps use 25%–35% of the energy used by incandescent lamps to provide the same amount of illumination (efficacy of 30–110 lumens per watt).
High-intensity Discharge Lighting – High-intensity discharge (HID) lamps provide the highest efficacy and longest service life of any lighting type. They can save 75%–90% of lighting energy when they replace incandescent lamps.
Incandescent Lighting – Incandescent lighting is the most common type of lighting used in homes. It has traditionally delivered about 85% of household illumination.
Low-pressure Sodium Lighting – Low-pressure sodium lamps provide the most energy-efficient outdoor lighting compared to high-intensity discharge lighting, but they have very poor color rendition.
Outdoor Solar Lighting – Outdoor solar lights are easy to install and virtually maintenance free. Best of all, they provide free electricity.
Replacing Lamps in Incandescent Fixtures Reduce lighting costs by replacing lamps in or “re-lamping” your older indoor and outdoor incandescent lighting fixtures.
Replacing Lamps and Ballasts in Fluorescent Fixtures – Although fluorescent lamps are generally energy efficient, there are new and more efficient lamps that use better electrodes and coatings than do older fluorescent lamps.
Lighting Maintenance – Maintenance is vital to lighting efficiency.
Turning Off Lights – The cost effectiveness of when to turn off lights depends on the type of lights and the price of electricity. The type of light is important for several reasons.