Reflow soldered solar LED street light should be used with cool white light output. LEDs which can be hand soldered should not be used so as to minimize human interference and increase the reliability of LEDs Asymmetric lenses with 85x135 angle for optimal spread on streets. Lenses should be such that the light output falling behind the pole should be minimized and falling in front and laterally should be maximized .Power saving mode after 6 hours of operation up to 50% of savings for longer life