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31 January 2007

Today, a short note to give you advance notice of a price rise, plus a look at lighting.

1) Buy Now!
2) What sort of lighting?

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1. Buy now!
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I've been told that my Solar Power Design Manual is too cheap. So I'm going to increase the price, but I thought I'd tell you first. The price increase is scheduled for 6 February - next Tuesday. if you're interested I'd advise you have a look now:

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My apologies if you've already got it.

2. What sort of lighting?
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It used to be straightforward - use a fluorescent lamp for general lighting and a halogen lamp for directed light. Perhaps it's not so straightforward now that LED lighting has become common.

How good are LED lights? Well very good actually - highly efficient and cool running. But that's not their main advantage really, it's the ability to direct a very small amount of light exactly where you want it.

In fact, an LED light is not quite as efficient as a compact fluorescent lamp - it doesn't convert as much of the electrical power to light. But, where can you get a fluorescent lamp that only consumes a couple of Watts? If you've got an application that needs highly focussed light, or a very small amount of light, then LED lamps may well be the best choice. They make very good torches for instance. But if you want to light a room then a fluorescent lamp with an electronic ballast is still the best bet. For now.

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