repairing of light sayer para-supply of 18 w luminaries of: a) 18 w led (philips/osram/equivalent repute make with bis certificate). b) charge controller and it should have over charge protection, deep discharge protection, battery reverse polarity protection, load short circuit protection, open circuit protection panel reverse polarity protection, over temperature protection. c) automatic dusk to drawn controlling system to monitor led operation. supply of 12.8v, 42 ah lithium ferro phosphate (lifepo4) battery having bis certificate). the batteries should have higher life expactancy, longer cycle life, low discharge rate and first charging facilities. battery should provided 12 hrs battery backup. the battery must be provided with gl out door type box/inbuilt in luminaries. provided citizen information board