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As the Hoya glass is exposed to UV C radiation for long periods of time, the UV transmission decreases until it eventually needs to be replaced. The LW and MW glass on the other hand passes about 85% of the LW UV and never wears out.  

We can supply replacement filter glass at a cost of $5.50 per square inch.  So if you need a 1” x 3” piece of glass the formula is 1 x 3= 3 then X  5.5= $16.50 (plus shipping). See replacement parts page.

**You do not have to own a Way Too Cool lamp to have us get you up and running!**