How Many Lumens Do You Need?

This is the first time I've seen someone cram a high pressure sodium bulb down to 35 Watts. Most of the time this bulb is used for industrial lighting or outdoor use in teh 250W range and higher. It gives off a really yellow tint (2000k color temp) and is therefore not something I like inside the house.

The real kicker here, is that a good CFL is in the range of 50-70 lumens per watt (depending upon brand and model). The full, long Florescent can get into the 80 lumens per watt range. The high pressure sodium bulb here is at 90 lumens per watt. That's impressive.

I can handle outdoor lighting being a bit yellow if it is really cranking out that high level of efficiency.

Toff Ward
SmartEnergyIdeas.com

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