Quote Originally Posted by Phoenix67 View Post
Sana water will also work like an optic fiber. Para yung light will pass through the tubig from the plastic bottle could be extended to another location.
That's the whole point of using water. It scatters the light.

If you just put a hole in the roof, the light will go straight down. Diffract it through water and it fills the whole room.

Quote Originally Posted by glenn manikis View Post
pang cave man naman kasi yan ganyan invention.....

mag lalagay ka ba nyan sa bahay mo?

bubutasin mo ba bubong mo dyan?

mas malaki pa ang cost mo dyan kesa bumile ka ng LED BULDS...
LED bulbs still cost a lot. An LED bulb that is as bright as a solar light is around 250 (super cheap) to 600 pesos (regular price).

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Many public buildings, offices and modern homes are built to take advantage of natural lighting. Our new City Hall has a lot of natural light, so even if all the hallways are equipped with LED bulbs, they're almost never on, not like the old, enclosed City Hall.

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The typical baro baro in the slum is built wall-to-wall with the next baro baro... and there's very little natural lighting to be had from open windows. A solar bulb like this is much less expensive than a natural skylight or even installing a light bulb (needs bulb, mount, switch, electrical wiring, etcetera). It can be done for just a hundred bucks (retail... cost to do is just 50 pesos). It's not useful the entire day, but it can cut down on the need for electricity. If it saves a household 100-200 pesos a month... with the only maintenance cost being to replace the water every few months... isn't it worth it?

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It may look funny to us, but it's cost-effective engineering. Which is why people are praising it.