The light bulb is on all day without costing electricity.

Homemade light bulbs made from plastic bottles help poor households around the world get rid of worries about electricity bills.

Homemade light bulbs made from plastic bottles emit light equivalent to a 55W light bulb. The night version of the plastic bottle light bulb is equipped with a mini solar battery and an LED bulb that can light up for 10 hours.

According to VNE