The technology has moved so fast in the last few months, the new trends are towards a 24volt dc solution. This allows super efficient LED bulbs that are reasonably priced. The secret is more in the solar panel controllers. Old tech pwm controls are only about70% efficient. Low wattage mppt controls are close to 99,7% efficent and now available in low wattage. Being mounted on the panel itself allows better and more efficient control. But its a African solution and not rest of world solution...
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