室内光源有碳弧光灯，白炽灯及石英灯等。室内的主光源是聚光灯和散光灯、泛光灯。聚光灯将光聚到一起。
Indoors light is furnished by carbon arc lamps incandescent bulbs and quartz bulbs. the basic indoor lights are spotlights and floodlights. spotlights throw a beam of concentrated intense light.
室内光源有碳弧光灯，白炽灯及石英灯等。室内的主光源是聚光灯和散光灯、泛光灯。聚光灯将光聚到一起。
Indoors light is furnished by carbon arc lamps incandescent bulbs and quartz bulbs. the basic indoor lights are spotlights and floodlights. spotlights throw a beam of concentrated intense light.
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