In some Philippine slums, solar skylights made from one liter soda bottles filled with water and bleach provide light equivalent to that produced by a 55 watt bulb and may reduce electricity bills by US $10 per month.
They provide light equivalent to that produced by a 55 watt bulb, and may reduce electricity bills by US $10 per month. In some Philippine slums, solar skylights are made from one liter soda bottles filled with water and bleach.
In some Philippine slums, solar skylights are made from one liter soda bottles filled with water and bleach. They provide light equivalent to that produced by a 55 watt bulb, and may reduce electricity bills by US $10 per month.
In some Philippine slums, solar skylights are made from one liter soda bottles filled with water and bleach. They provide light equivalent to that produced by a 55 watt bulb, and may reduce electricity bills by US $10 per month.