congrats, That's the one good thing I recently found here.
The renewable energy is the way to go.
I don't know if Indian Electricity Deptt. has the facility to give credits for the energy you make extra over and above your usage is bought by them
but I've read that in U.S.A. such setup starts paying you or at-least give you discounts/adjustment towards your electricity bills.
Read that you did some D.I.Y. stuff for making those L.E.D. bulbs, Great work, thats the way to adopt L.E.D. in India, as options are still on growing stage
and are not cheap as compared to china where most things are getting replaced with L.E.D.
however I am surprised to see
you wrote "Rs.150 for 3 LEDs" that disturbs me.
I started selling 1 Watt L.E.D. on
ebay, and the horrible policies of eBay India suspended my account for missing feedback, are other issues.
and my shop closed before it even picked up the pace :-(
anyways if you wish to buy 1 watt Cool white/warm white L.E.D. I can link you to my local dealer and pricing is worth a look,
let me know via PM if you need pricing.