"AndWhyNot" wrote in message
s.com...
Hi All and Seasons Greetings,

A freind has a light emmiting device (Bioptron) for the treatment of
leg ulcers (and very successfully it is too)

Just wondering what it would do to my African Violets which are
looking a bit sad at the moment, or indeed any sad indoor plant.

The device does not appear to generate any significant 'heat' so wont
fry the violets .............. I hope

Any ideas???

**** The wavelength of BIOPTRON Light ranges from 480 nm to 3400 nm.
The BIOPTRON electromagnetic spectrum does not contain UV radiation
*****

If the wavelength limits you quote are correct, then your friend appears to
have fallen for a con trick. 480 nm is in the blue region, and the output
of the lamp is said to go from there, through the whole optical region all
the way to very far into the infra red.. That is in fact very much what an
ordinary light bulb does. Moreover, the 3400 nm wavelength is well into the
wavelength range of radiant heat. So, if as you say, there is not much heat
associated with it, there just is not much by way of radiation.

In short, your friend might as well use an ordinary light bulb, ( except for
possible psychological effects associated with the fancy name) and no, it
will not be of much use for your African Violets.

Franz