requirements (in terms of their automatic/manual fire alarm system, sprinkler system, emergency lighting andexitsigns,etc.). legco.gov.hk legco.gov.hk 視察範圍涵蓋樓宇安全及相關規定(即逃生途徑、門鎖、樓 宇結構規定、照明及通風、不可容忍的違例建築工程、耐火 結構、升降機及殘疾人士洗手間等項目)和消...
The new exit sign incorporates a concealed surface cable entry, as well as the existing rear BESA cabling facilities. It operates in maintained mode and complies with the minimum luminance and uniformity requirements of EN 1838, providing a minimum of three hours' illumination from an 8W T5 ...
LUMINANCE REQUIREMENTS FOR ILLUMINATED SIGNS VARIOUS COMBINATIONS OF BLACK AND WHITE LETTERS AND BACKGROUNDS WERE NIGHT-TESTED IN THE FIELD, USING AN INTERNALLY ILLUMINATED SIGN, TO COLLECT DATA ON TH... TM Allen,F. Dyer,G. Smith,... - 《Highway Research Record》 被引量: 7发表: 1967年 Rea...
compact and tubular fluorescent lamps, electro-luminescent (EL lamps and light emitting diodes (LEDs). LED technology offers low power consumption, long lamp lives, and low maintenance requirements. With LED illuminated signs, annual energy
To meet these high intensity of light requirements, incandescent lights have traditionally been used in such applications. There has been an increase in the use of light emitting diodes ("LEDs") for illuminated signage, however, because of their desirable properties of high reliability and energy ...
Specifically, the switches should meet the requirements of The National Electrical Manufacturers' Association (NEMA) ratings: Types 2, 3, 3R, 3S, 4, 4X, 6, 12 and 13. The key used to operate the switch should have a means for providing a tactile feedback to inform the user of a ...
LUMINANCE REQUIREMENTS FOR ILLUMINATED SIGNS VARIOUS COMBINATIONS OF BLACK AND WHITE LETTERS AND BACKGROUNDS WERE NIGHT-TESTED IN THE FIELD, USING AN INTERNALLY ILLUMINATED SIGN, TO COLLECT DATA ON TH... TM Allen,F. Dyer,G. Smith,... - 《Highway Research Record》 被引量: 7发表: 1967年 Rea...
LUMINANCE REQUIREMENTS FOR ILLUMINATED SIGNS VARIOUS COMBINATIONS OF BLACK AND WHITE LETTERS AND BACKGROUNDS WERE NIGHT-TESTED IN THE FIELD, USING AN INTERNALLY ILLUMINATED SIGN, TO COLLECT DATA ON TH... TM Allen,F. Dyer,G. Smith,... - 《Highway Research Record》 被引量: 7发表: 1967年 Rea...
LUMINANCE REQUIREMENTS FOR ILLUMINATED SIGNS VARIOUS COMBINATIONS OF BLACK AND WHITE LETTERS AND BACKGROUNDS WERE NIGHT-TESTED IN THE FIELD, USING AN INTERNALLY ILLUMINATED SIGN, TO COLLECT DATA ON TH... TM Allen,F. Dyer,G. Smith,... - 《Highway Research Record》 被引量: 7发表: 1967年 ...
are used herein merely as labels, and are not intended to impose ordinal, positional, or hierarchical requirements on the items to which these terms refer. Moreover, reference to, e.g., a “second” item does not require or preclude the existence of, e.g., a “first” or lower-...