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UVA Lamps For many applications, the longer wavelength spectrum emitted by UVA lamps is recommended. UVAs are especially useful for tests comparing generically different types of polymers. Because UVA lamps have no UV output below the normal solar cutoff of 295 nm, they usually do not degrade materials as fast as UVB lamps. However they usually give better correlation with actual outdoor weathering. This lamp is the best available simulation of sun light in the critical, short wavelength UV region between 365 nm and the solar cut-off of 295 nm. Its peek emission is at 340 nm.
The UVA-351 is recommended for simulated sunlight filtered through window glass. Its most useful for indoors or automotive interior applications. These lamps are manufactured to the Q-Panel specification, to produce closer control than commercially available UVA sources.
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