This BBC report on why eco light bulbs aren’t what they seem is one of the best articles I’ve seen yet on the issue of eco bulbs for the home – the technology, the real pay-back figures, their effectiveness and the future. Worth the read.
At home, brightness varies as conditions change. “A compact fluorescent light is designed to provide maximum light output at 25C, and when it gets hotter or colder than that, its brightness can be reduced. “If your bulb is in a recessed fixture in the ceiling, and it gets warm, you might see a 10-20% reduction in its light output.”