A source of illumination.

रोशनी

English Usage: The light in the room was too bright.

Hindi Usage: कमरे में रोशनी बहुत तेज थी।

Having little weight; not heavy.

हल्का

English Usage: This bag is light enough to carry.

Hindi Usage: यह बैग उठाने के लिए हल्का है।

To illuminate or set something on fire.

जलाना

English Usage: Please light the candle.

Hindi Usage: कृपया मोमबत्ती जलाएं।