erection of 18 watt led based solar street light system to be installed at bangar heritage area (total 37 nos.) in the district of dakshin dinajpur- 1 supplying and fixing of integrated solar 18 watt led street light in aluminium extruded enclosure ip65 with built in mono or poly crystalline panel, lithium ferro phospate battery (lifepo4), mppt charge controller and sensor with colour temperature between (5500-6500) degree kelvin, having following minimum specification on top of tubular pipe pole.solar panel: 50 watt peak or higher.lumen output: 120 lumen/watt.viewing angle: 120° or higher.red led for battery lowgreen led for solar chargingbattery capacity: 12v, 24ah or higher.autonomy: 2 days,expected battery life: 2000 cyclesin-built bms for battery safetymaintenance free operating temperature of (lifepo4): 10° c to + 55° chigher efficiency > 90%battery charging time not more than a dayreverse polarity protection for battery & solar panelover charge &over discharge & deep discharge protectionover voltage & over current protection from solar pv moduledusk to dawn operation, cooling air naturalbis/mnre/iec approved.make: crompton / havells / bajaj / surya/ eq 2 supplying and installation of 6 mtrs long, 76.1 mm outer dia, 3.6 mm thick, conforming to is 1161: 2014 with corrosion proof galvanisation conforming to is 2629-1965 withpole cap at top and base plate of 3 mm thick 200 mm x 200 mm and coupler for fixing luminary set in cc foundation (proportion and dimension) indicated below, having 600 x 600 x 150 mm thick cc (4:2:1) base block below base plate / pole with hard metal including cc with metal chips (6:3:1) of size 600 x 600 x 1000 mm below ground level including 3 mm thick neat cemented finish and gl earth bolt after making drilled holes etc. on pole & carriage of pole at work-site including filling up the excavated earth pit with shifted soil and ramming properly. 3 sub total 4 gst 18% 5 cess 1%