You don't have to worry about burning a hole in your wallet for LED (light emitting diode) bulbs.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/nda-govt-takes-etail-route-push-led-drive
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/leds
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-efficiency
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cfl
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-power
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy