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Newsletter Archive

E-News Issue #92

6 December 2005

New Email Service

We have ditched Topica who used to send our newsletter and we are now using our own server to send out this newsletter. So no more ads to clutter up our newsletter! If you experience any problems please let us know.

Efficiency of 12V Lights

In layman's English, the overall output of a light is measured in lumens. This is different from luminance, which is the perceived brightness of light falling on a surface illuminated by a lamp. This is measured in lux. So lumens is the best indication of how much a light will light up your room. The efficiency of a light is usually measured as lumens per watt.

We produced a chart of some of our popular 12V lights listing their lumen output and efficiency as given to us by the manufacturers.

As pointed out in other articles in our FAQ Lighting section, the perceived brightness of a light is also influenced by other factors such as the colour of the walls, use of reflectors etc.

Cheers from Dave and all the RPC crew.

Dave Lambert (Director)

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We install solar systems in Northern NSW and Southern QLD.


QLD:
Gold Coast (from Coolangatta to Southport), Nerang and Hinterland (Beaudesert) and out West (Warwick, Stanthorpe, Killarney)


NSW:
Northern NSW (Tweed Heads to Yamba, including Evans Head, Byron Bay and Ballina); the Far North Coast Hinterland (Grafton via Lismore to Murwillumbah) and out West (Casino to Tenterfield, including Drake and Tabulam, as well as Woodenbong and Bonalbo)

For larger system we also go up to Brisbane or down to Coffs Harbour and even Glen Innes. Other places by arrangement.