Kerosene lamps typically require 5 ml to 42 ml of kerosene per hour for light output varying from 8 lumens to 67 lumens.
If we assume that higher capacity lamp is used for 4 hours in the night and the lower capacity lamp for 8 hours in the night, 208 ml of kerosene is required in a day and for a month 6 litres will be required. In India, Kerosene is sold at subsidized rate of Rs. 12.50 and at this rate it come to Rs.75 per month for the consumer. If a solar lamp is sold at Rs. 600, it can mean a saving of Rs.300 per month in the first year itself for the consumer. The payback period comes to 8 months.
The country will save on subsidy which is around Rs.20 per litre now.
Ref:
http://saurorja.org/2011/07/18/kerosene-vs-klean-lighting-up-rural-india-cost-and-emission-analysis/
http://www.rpc.com.au/information/developing-countries/fuel-based-lighting.html
http://www.repoa.or.tz/documents/RR_11_2.pdf
Danish artist Olafur Eliasson wants to offer solar lamp for $10 to consumers in India.
http://economictimes.indiatimes.com/news/news-by-industry/et-cetera/danish-artist-olafur-eliasson-designs-10-solar-lamp-to-sell-in-india/articleshow/15333637.cms
It will be sold to retailers at $5.
News in Economic Times 3 august 2012.
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