Sites:
Home > Technical Library > Optical Components and Optics > Light Sources > Raw vs. Effective Lumens

Raw vs. Effective Lumens

From J.W. Speaker Corporation

LED lamp output values (Lumens) can vary dramatically depending on which values are being quoted. The following information may assist selecting the right product for the right application.

There are inherent losses associated with any lamp (LED, Halogen, HID or Incandescent). The main losses are related to 3 items: Thermal Losses, Optical Losses and Assembly variation.

Read the Whole Article
Products & Services
Lighting Controls
Lighting controls include monitors, communication systems, and other devices for controlling facility lighting systems.
Lighting Fixtures
Lighting fixtures produce artificial light in industrial areas or workspaces.
Illuminators
Illuminators are used to provide adequate contrast for imaging. Illuminators include backlights, LED illuminators, and fiber optic illuminators.
Headlamps
Headlamps are light sources that attach to a person’s head or helmet with flexible straps. They are used in dark or low-light environments where personnel need the use of both hands to perform an operation or activity.
Lamps
Lamps are light sources that emit incoherent light for illumination. There are many different types of products. Examples include fluorescent lamps, halogen lamps, heat lamps, incandescent lamps, LED lamps, projection lamps, spectral lamps, and stage lamps. Specialized and proprietary lamps are also available.
Product Announcements
Elmet Technologies, Inc. - Lighting Components
Elmet Technologies offers a full array of lighting components both as a manufacturer and as the exclusive North American representative for Philips Lighting components produced globally. Their... (read more)
Dialight Corp. - LED Wallpack Fixture Added to SafeSite® Series
Dialight, an innovative global leader in LED lighting technology, announced today that its SafeSite™ Series LED Wallpack Luminaire has achieved Class I, Division 2 certification for use in... (read more)
Dialight Corp. - New Ultra High-Efficiency SafeSite® LED High Bay
The first of its kind, the Dialight SafeSite® Series LED High Bay luminaire was designed specifically to replace conventional high bay lighting fixtures in hazardous location applications. (read more)
Fiberoptics Technology, Inc. - 3-4x Brighter Than Halogen-LED Light Engine
High power LED light source project for large active diameter industrial applications. Using a very simple but effective patent pending coupling strategy, FTI engineers can couple the light from a... (read more)
J.W. Speaker Corporation - Model 6040 4.5
The perfect upgrade for your PAR36 sealed beams, the new Model 6040 will shine brighter, last longer, and use less energy than bulb-based PAR36 lights. Available in your choice of 12V DC or 12-48V DC... (read more)
 
Topics of Interest

The Lumen Method It is always valuable to keep in mind the definition of a footcandle: It is the quantity of lumens per square foot of illuminated work surface. This definition alone provides the...

Characteristics of Typical Lamps Table 8-1 lists the leading characteristics of a wide selection of typical lamps, including incandescent, PAR, R, and ER, tungsten-halogen, fluorescent, mercury,...

Motor performance will vary even though the motors are built to the same engineering specification and manufacturing procedures. Performance variation is attributed to motor losses. The five basic...

This chapter explains the basic operation and application of the essential fiber optic test equipment available to the fiber optic installer and technician. The basic theory, operation, and...

With advanced high-power packaging technology, large-area chips offer a number of advantages over arrays, according to Bob Karlicek, John Graff and Dave Sciabica.For general illumination, conventional...