Most address numbers probably don't have back lights, but I suppose if you're going to light them, you might as well do it with solar power and LEDs. That's how it's done with these Solar LED Address Numbers from Think Geek. The numbers turn on automatically and can last up to 10 hours on a full charge. Each number runs about $16. My place is in dire need of a number swap, so I guess these are now at the top of the list. What do you think?
At IBS 2010 last week, CertainTeed announced their new EnerGen Photovoltaic Solar Power Roofing System, which is offered through a partnership with Energy Conversion Devices, manufacturer of UNI-SOLAR thin-film solar laminates. The EnerGen system combines lightweight UNI-SOLAR panels with traditional asphalt roofing shingles. The photos in this article show a 3.2 kW EnerGen system installed on the official governor's residence of Michigan.
Water efficiency is an important measure in green building everywhere, but in Australia — one of the driest countries in the world — water conservation is more widely practiced and water awareness is generally higher than it is in North America. In addition to pioneering water efficiency, Australians have discovered some problems due to the use of efficient, low-flow fixtures. One is the potential problem of "dry drains," however, a new invention called the Drainwave aims to solve the problem.