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The testing division of Cascade TEK, with laboratories in Hillsboro and Longmont
is now Element Materials Technology. Learn more at Element.com.

Accelerated Weathering Test - 1 Year Outdoors = How Long In A Test Chamber?

Posted on Jan 16th, 2014 by marybabitz
UV light testing - how long in a chamber

Many of our customers who want to perform accelerated weathering tests ask us how long in a test chamber equates to 1 year outdoors.   Unfortunately, there is no direct correlation.   Cascade TEK's accelerated weathering webpage offers more detail, but don’t take our word for it.  Attached is an article from Q-Lab Corporation, one of the leading manufacturers of weathering/UV exposure chambers.

UV Exposure Testing - Bulb Types

Posted on Jan 3rd, 2014 by marybabitz
UV exposure testing, accellerated weathering test

Here is a quick run-down on the types of bulbs used in UV, Accelerated weathering tests. 
 
There are many different spectral irradiances of UV bulbs.  Generally speaking: 
500 hours under UV-B bulbs = 1 year of South Florida exposure
1000 hours under UV-A bulbs = 1 year South Florida exposure
1000 hours under Xenon Arc = 1 year South Florida exposure
There are additional UV exposure categories for an Arizona climate.  (Dry, more intense UV & heat )
UV-A Bulbs:

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