ANSI IESNA-RP-27.1-2005 pdf download Recommended Practice for Photobiological Safety for Lamps and Lamp Systems – General Requirements
3.4 Exposure Limit A value of exposure to the eye or skin that is not expected to result in adverse biological effects is called the exposure limit.
3.5 Exposure Distance Nearest points of human exposure consistent with the application of the lamp.
3.6 General Lighting Source, GLS A general term for lamps intended for lighting spaces that are typically occupied or viewed by people. Examples would be lamps for lighting offices, schools, homes, factories, roadways, or automobiles. It does not include lamps for such uses as film pro- jection, reprographic processes, “suntanning,” indus- trial processes, medical treatment, and searchlight applications. It also does not include lamps with outer envelopes constructed from quartz material that is not doped to block UV-B and UV-C (see Section 3.19). Although lamps with undoped quartz outer envelopes may be used in locations typically occupied by peo- ple, their potential to emit ultraviolet power requires that they be more carefully evaluated. The process for classifying lamps is described in sections of the third document in this series, Recommended Practice for Photobiological Safety for Lamps – Risk Group Classification and Labeling, RP27.3.
3.7 Hazard Distance See Skin Hazard Distance (Section 3.18) or Ocular Hazard Distance (Section 3.13).
3.8 Infrared Radiation For practical purposes any radiant energy within the wavelength range 770 nm to 10 6 nm. The infrared spectrum is divided into three spectral bands for safe- ty purposes: IR-A (770 nm to 1400 nm), IR-B (1400 nm to 3000 nm), and IR-C (3000 nm to 10 6 nm). Note: Infrared radiation is generally evaluated in terms of the spectral total radiation per unit area (irradiance) incident upon a surface. Examples of appli- cations of infrared radiation are industrial heating, drying, baking, and photo-reproduction. Some applications, such as infrared viewing systems, involve detectors sensitive to a restricted range of wave- lengths; in these cases, the spectral characteristics of the source and detector are of importance.
3.9 Lamp The generic name for a man-made source of light is “lamp.” As used in this standard, the term means an electrically powered source, other than a light emitting diode (LED) used in a fiber-optic communication system or a laser. By extension, the term is also used to denote sources that radiate in regions of the spectrum adjacent to the visible region, i.e., in the ultraviolet and infrared spectral ranges. Devices that generate light and have integral comonents for optical control, such as lenses or reflec- tors, also are considered lamps. Examples include a lens-end lamp, and a PAR lamp with a reflector or lens cover. Note: A device consisting of a lamp with shade, reflector, enclosing globe, housing, or other acces- sories has often been called a “lamp.” However, in this standard, a lamp with such other components is termed a “lamp system” to distinguish between the assembled unit and the light source within it.
3.10 Lamp System Any manufactured product or assemblage of compo- nents which incorporates, or is intended to incorpo- rate a lamp is considered to be a “lamp system.”
3.11 Lamp Packaging Any carton, outer wrapping, or other means of con- tainment that is intended for the storage, shipment, or display of a lamp(s) or that is intended to identify the contents or to recommend its use is considered to be “lamp packaging.”
3.12 Minimal Perceptible Erythema, MPE The minimum erythemal dose (MED) is the radiant exposure density, e.g., J • m 2 , that is just sufficient to elicit a perceptible delayed erythema, i.e., a Minimum Perceptible Erythema (MPE). The MED varies with skin type, time between exposure and evaluation, and ultraviolet spectral distribution. (See Section 3.3). 3.13 Ocular Hazard Distance The distance from a source within which the “pro- jected radiance” (see Glossary) or irradiance exceeds the applicable exposure limit for momen- tary (0.25 s to 0.5 s) viewing.