Bhanu - The Miners' Cap Lamp - Estimated over 2 lakh (miner workers) were potential users for this product. Present product is bulky ( weighs 2.5 Kgs) with an acid battery which needs daily charging for 8 hrs.
Bhanu, a sleek single piece cap lamp weighed just 254 grams , worked with Ni MH battery with a warm white light of 350mA K2 LED. The charging time also reduced drastically