It turns the light off by restricting the oxygen or the chemicals needed to produce the light. However, the light at the end of the glowworm tunnel is not the hopeful sign an insect expects.
लेकिन, जुगनू गुफ़ा के छोर पर की रोशनी एक आशा का चिन्ह नहीं है जैसी एक कीट अपेक्षा करता है ।