Photometric performance of roadway and street lighting luminaires

1.1

This Standard specifies photometric performance requirements for luminaires that are used for roadway

and street lighting applications.

1.2

The following light sources are addressed in this Standard:

a) clear HPS lamp;

b) clear metal halide lamp;

c) induction; and

d) LED.

Note: Future editions of this Standard might include other light sources, such as plasma.

1.3

This Standard is based on

a) average luminance, luminance uniformity ratio, and veiling luminance ratio as defined

in ANSI/IES RP-8;

b) nominal input power in watts for HID sources;

c) rated lamp lumens for HID sources;

d) luminaire input power in watts and rated luminaire lumens for Induction and LED sources; and

e) absolute photometry for LED sources as per IES LM 79.

1.4

This Standard is not a design document, and is intended to establish luminaire photometric performance

efficiency only.

Tables 4A, 4B, 5A, 5B, 6, and 7 are intended to be used to establish maximum unit power density (UPD)

values for typical applications as per the parameters listed in Table 1. UPD values provided in this

Standard are not intended for specification or application purposes.

Notes:

1) The UPD values for MH luminaires in Table 5A and 5B do not include ballast losses and ballast factor (BF). The

UPD values for all applications include a light loss factor of 1 (LLF = 1.0).

2) It is the responsibility of designers to select the optimal combination of fixture type, pole height, and spacing

to ensure an optically efficient design. For guidance on design, see ANSI/IES RP-8.

1.5

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to

satisfy in order to comply with the standard; “should” is used to express a recommendation or that

which is advised but not required; and “may” is used to express an option or that which is permissible

within the limits of the Standard.