According to the National Electrification Commission, in 2009 about 3 million households remained "powerless" even if electric facilities are available, and many rural communities in the Philippines lack access to electricity. One answer to this problem has been the introduction of the solar bottle bulb, which is a cost-effective light bulb created using a plastic bottle filled with filtered water and bleach. 

That’s where Isang Litrong Liwanag comes in. It’s a sustainable lighting project that aims to bring the bottle bulb to underprivileged communities. Details about the campaign itself are a bit unclear, but the video beautifully illustrates the cause.

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