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UVB Lamp Misrepresented
from Archives: Homemade
am looking for a source to buy a UVB lamp myself, because my doctors will
not prescribe a home unit for liability reasons. I checked the specs on
the F20T12/350BL bulb [mentioned in "Homemade UVB" in the
FlakeHQ Archives], and found that it is UVA! (350 refers to the wavelength
in the UVA region) and it has no power in the UVB region 290-320nm. People
who do things without fully understanding what they are doing cause
products to become regulated, adding cost and limiting my choices. -John
Response: Thanks for pointing
out our error. I’m
including a note in the background email (“Homemade UVB”) to read this
exchange, too. That way,
anyone in the future who goes to “Homemade UVB” will be nudged to read
this as well.
light of your discovery, using the term “UVB” was inappropriate.
That Robert’s lamp emits light at a higher frequency (by 30
nanometers) places it outside that portion of the spectrum arbitrarily
named “UVB.” Granted, we
need to know this for truth in advertising.
However, does this compromise Robert’s results with his lamp? Perhaps not.
must remember that with radiation we are dealing with a spectrum.
Characteristic effects of particular wavelengths pay no heed to
our taxonomy. The difference
between UVB and UVA — especially at the 30 nm margin — is, well, marginal.
In other words, though Robert didn’t really find a
non-prescription UVB lamp to use in his homemade light-therapy device, he
evidently found a lamp emitting light radiation at a wavelength close
enough to UVB to help.
Not only would this explain why Robert was able to buy the lamp without a prescription, it might point to an economical compromise worth trying before you pay greater amounts to get a prescription for and then buy 30 more nanometers of emission. I’m not recommending it ... just making a point. -Ed