LUMINAIRE CLASSIFICATION
The IESNA’s revised Luminaire Classification System [TM15-07 revised] creates a new basis of measurement for site lighting visibility and adjacent property interaction. This technical memorandum subdivides the luminaire distribution into smaller angular zones and subzones to more clearly represent how much light is emitted at various angles. The values for each subzone give an indication of the appropriate use for the luminaire within an application. For dark sky sensitive areas, the uplight component tells how much the luminaire will contribute to sky glow.
For applications with strict light trespass regulations, the back light portion of the distribution helps determine how much light will reach neighboring properties. Talon reflector assemblies keep light
on task by contributing as little as 0.0% total upward illumination and 0.8% total backlight.
Forward Light
Forward Light Low [FL]
Forward Light Mid [FM]
Forward Light High [FH]
Forward Light Very High [FVH]
Back Light
Back Light Low [BL]
Back Light Mid [BM]
Back Light High [BH]
Back Light Very High [BVH]
Uplight
Uplight Low [UL]
Uplight High [UH]
NEIGHBORHOOD AND DARK SKY FRIENDLY
Uplight
180°
| UH |
100° | 100° |
UL | UL |
90° | 90° |
BVH | FVH |
80° | 80° |
BH | FH |
60° | 60° |
BM | FM |
Back | Forward |
BL | FL |
30° | 30° |
| 0° |
[nadir] |
National organizations work to educate the general public on best lighting practices in order to minimize light trespass, reduce sky-glow and improve nighttime visibility through glare reduction. Experts understand the visual system adapts to surrounding ambient conditions, spurring a move from universal light level recommendations to a set of custom tailored guidelines for each task based on an application’s lighting zone. When surrounding conditions are dim, lower levels of light are able to be detected more easily. In these environments, high light level applications can be a source of discomfort and glare. Careful selection and placement of luminaires eliminates glare and creates a comfortable nighttime environment. Talon’s assortment of specialty light control optical assemblies combined with a wide array of internal or external house-side shields provide the perfect solution for every application.
Glare |
Light Trespass |
Property |
Line |
Uniform Task Illumination |
