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Good and Bad Lighting
Light and Our Eyes
12 other sections not shown
amount of light angle Appendix bayonet cap beam bench bimetal building cable calculate candlepower candles cathode ceiling cent centre Chapter circuit cleaning coefficient of utilization Coil Coiled cold cathode colour connected direct fittings direct glare distance effect efficiency electrodes feet filament lamps floodlighting fluorescent lamps fluorescent tubes foot-candles G F F gas discharge lamps give H G F H H G hot cathode industrial installation isolux lamps and fittings Lamps Type level of illumination light output light reaches light source lighting system lumen output lumens/sq lumens/square foot matt surface mercury lamp method normal object obtained outdoor polar curve produce reflection factor reflector room index seen shadows shown in Fig side Special Lighting sufficient suitable switch Table tion total lumens transformer type MB/V type of fitting type of lamp type of lighting ultra-violet usually value of illumination vitreous enamel voltage volts walls wavelengths