EBOOK
About
Never fear being left in the dark when electricity goes out. This book describes light and lighting including how to measure light and how much light you actually need. Covers candles, firelight, flashlights, lanterns, and light from solar energy. Explains how long emergency lights can last and how to get the most light for the least cost. Here's how to be comfortable, if not cozy when power goes out. Charts, tables, and numerous photographs.