LETTERS

摘要

A great overview of lamps and ballasts. Two comments: 1.I think the efficacy of compact fluorescent lamps is underrated. The basic 26W at 1800 lumens translates to 69 lumens per watt. A 32W lamp at 2400 lumens equals 75 lumens per watt, not the 56 shown on the chart.rn2. The plasma high-intensity discharge lamp referenced in the article is made by Luxim, a San Francisco Bay Area company. This technology may be worth a closer look. I've seen it firsthand and it's got specs that are worth paying attention to: 120 lumens per watt, 95 CRI, dimmable to 20 percent, and it can be digitally addressed. I also saw demonstrated rapid start-up and restrike, unlike any other metal halide source.