Solar prices are dropping; even so, solar power still costs more than just feeding off the electrical grid in most developed countries. But thanks to the falling price and low-energy use of LED lights ...

In daylight, my garden is a beacon of color and texture, but when the sun sets, the yard becomes a black hole. Delivery drivers struggle to see the house numbers or find the footpath, and I hold my ...

An LED light that runs on rope pulls and gravity has been developed, which could be good news for developing countries without access to stable lighting. GravityLight, a crowdfunding campaign and ...