GB/T 23110-2008
Photometry for floodlights (English Version)
- Standard No.
- GB/T 23110-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 23110-2008
- Scope
- These recommendations are intended to cover photometric testing for indoor and outdoor floodlights using incandescent or discharge tubes (including tubular fluorescent lamps) or lamps with reflectors as light sources. A similar approach can be used with gas or oil floodlights. These recommendations apply only to luminaires for visually stable lighting and not to strobe lights. The photometric test method recommended in this standard does not include searchlights for signaling purposes, road lighting, automotive headlights (some of which are dealt with elsewhere), nor does it include "imaging" optical devices, although similar methods can be used very well. well applied to the photometry of these devices. This standard does not cover luminaires whose angle between the peak and half-peak directions of luminous intensity is less than 2° (i.e. 2 x 2°, or symmetrical beams with a half-peak divergence of 4°), which require special methods for photometric measurement. Information on these measurements can be found in the literature, for example: a) JMWaldram, "Photometry of Searchlights", Trans. Illuminating Engineering Society (London), 16, 187, 1951 b) Symposium "On Searchlights", Illuminating Engineering Society (London) ) Published, 1948 c) "IES Guidelines for Photometric Testing of Searchlights", Lighting Engineering, 53, 155, 1958 d) "National Bureau of Standards: Photometric Measurements of Searchlights", NBS Technical Note 198, published on 1963-12-17 This article The light intensity value described in the photometric measurement and results can be expressed by light intensity distribution curves, iso-intensity diagrams or tables suitable for computer calculations. These light intensity values are extrapolated from illuminance measurements when the inverse square law of distance holds true. See 4.4.2. In some cases it may be more appropriate to measure other photometric data, for example where the plane of the illuminance distribution is fairly close to the luminaire, like a "wall washer" luminaire. This standard does not deal with such measurements and will be dealt with by a separate document.
GB/T 23110-2008 history
- 2008 GB/T 23110-2008 Photometry for floodlights
