The incandescent lamp has given way to the compact fluorescent lamp (CFLs) which is more energy-efficient. The CFL is likely to be phased out gradually by the Light Emitting Diode.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/leds-play-key-role-solar-energy-scheme
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-thiruvananthapuram
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-efficiency
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bulbs
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/leds
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala