THE SPECIFICATION OF LED BASE SOLAR LANTERN – PRICE: Rs. 1650/- Ex KOLKATA, VAT & OTHER TAXES: AS APLICABLE.

 DEFINITION:

Light Emitting Diode (LED) is a device which emits light when an electric current passes through it. A LED based solar lantern aims at providing solar electricity for operating LED lights and/or other small DC loads for specified hours of operation per day.

LIGHT SOURCE:

i)                    The light source will be of white LED type. Single lamp or multiple lamps can be used. View angles of a minimum of 120º and above will be preferred. The luminous performance of LEDs used should not be less than 55 lumen/watt. The colour temperature of white LEDs used in the system should be in the range of 5500º K to 6500º K. Use of LEDs which emit Ultraviolet light is not permitted.

ii)                   The light output from the white LED light source should be constant through out the duty cycle.

iii)                 The lamps should be housed in an assembly suitable for indoor use.

BATTERY:

6Vx 4.5 Ah sealed battery.

MODULE:

6V x 3 Wp.

Total capacity of LED:3mm white LEDs X 36 Nos. totalling 1.8 watt.