Quote:
7.0 meter is actually more important than the 5.0.
5.0 is only for reference and bragging rights.
7.0 is for TIME TILL BURN (4MED) this is what you need.
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Just call me Angerfant.
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Egg(fant) is correct - sort of.
ANY of the Solarmeters can be used for lamp aging tests. Check 'em when they're new (after break-in as mercury balls quit swirling) and renew them when they drop off 30% from new reading. This IST article explains it all:
http://www.islandsuntimes.com/04-07/measure.htm
The 5.0 is best for browning rays. The 7.0 is for burning rays (like big UVB panthers, etc). You need some of BOTH rays to make good tans... but not TOO much 7.0 meter rays.
The FAQ page and the Model pages at NEW website
www.solarmeter.com should help answer any questions.