Solar Lantern

SPECIFICATIONS
The broad performance specifications of a W-LED light source based solar lantern system are given below:

PV Module                         : 4/5 Wp under STC

Battery                                 :  Sealed Maintenance Free (SMF) lead acid battery of 12V, 7AH
OR
NiMH or Lithium-Ion or Lithium Ferro Phosphate Battery

Duty cycle                           : 4 hours a day (at full brightness level), under average daily insolation of 5.5
kWh/ sq.m. on a horizontal surface.

Autonomy                          :  Minimum of 3 days or 12 operating hours per permissible discharge.

Light Source                       : 2.0  Watts (max.) W-LED luminaire, dispersed beam, soothing to eyes with
the use of proper optics and diffuser

Light Output                       :  Multiple Light levels
The lamp should have two levels of light (operation at 100 % power and 60% power) to take care-of the different lighting needs, as per the User requirements.

Minimum level of illumination from W-LED lantern (at full brightness level)  
should be as follows: