范围1。1本标准规定了用于道路和街道照明应用的灯具的光度性能要求，作为单位功率密度（UPD）的函数。1.2本标准涉及以下光源:a）透明HPS灯b）透明金属卤化物灯和c）LED。1.3本标准基于ANSI/IES RP-8中定义的平均亮度、亮度均匀度比和遮蔽亮度比；b） HID光源的标称输入功率（瓦特）；c） HID光源的额定灯流明；d） 根据ANSI/IES LM-63和IES LM-31e，HID光源的相对光度测量灯具输入功率（瓦特）和LED光源的额定灯具流明，不包括恒定光输出（CLO）应用； andf）根据IES LM-79.1.4，LED光源的绝对光度测定本标准不是设计文件，仅用于根据典型道路配置确定灯具光度性能效率。表4、5和6用于根据表1中列出的参数确定典型应用的最大UPD值。本标准中提供的UPD值不适用于规范或应用目的。用户特定的道路几何图形可能与创建这些表时使用的模板不同。特定设计的要求可能需要在分布、流明封装和瓦特数方面有不同的变化。 用户应在自己的几何结构内，将UPD作为供应商间比较的衡量标准进行审查，并应注意UPD水平将与本标准中的表格不同。

Scope1.1 This Standard specifies photometric performance requirements for luminaires that are used for roadway and street lighting applications as a function of unit power density (UPD).1.2 The following light sources are addressed in this Standard:a) clear HPS lampb) clear metal halide lamp andc) LED.1.3 This Standard is based ona) 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) relative photometry for HID sources as per ANSI/IES LM-63 and IES LM-31e) luminaire input power in watts and rated luminaire lumens for LED sources and does not include constant light output (CLO) applications; andf) 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, based upon typical roadway configuration.Tables 4, 5, and 6 are intended to be used to establish maximum 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.User specific road geometries could differ from the templates used in the creation of these Tables. Requirements of specific designs might necessitate different variations in distribution, lumen packages, and wattages. Users should review UPD as a measure of comparison across suppliers, within their own geometry, and should note that UPD levels will then vary from the Tables within this Standard.