This info is found here: http://infrapowerpanels.com/infrared-technology/op... SEND ONLY LINK to customers, not info contained below, as it is taken directly from Infrapower's website.
It is very important that a radiant panel produces IR rays at a certain high efficiency rate. However, it is of same importance that most of the rays are in a certain infrared spectrum. EMBER has developed with Japanese and Austrian technicians a special formula for its heating element and a unique reflector technique that 99% of the produced infrared rays are in the optimum IR spectrum.
Here is some more background information:
Infrared is electromagnetic energy. It is part of the electromagnetic spectrum which is comprised of radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays. In the electromagnetic spectrum, infrared falls in between microwaves and visible light waves. Its wavelengths are shorter than microwaves but longer than those of visible light.
The sun produces many different type of rays (from Microwaves to Visible Light and X-Rays, see graph above). Only rays which fall in a certain spectrum (0.75 to 15 microns) do the heating. These rays are called Infrared Rays (A) Near-, (B) Medium- and (C) Far IR Rays. The best and most efficient spectrum for heating is the C Spectrum (Far IR rays, 6 to 10 microns).
Therefore, it is important that an infrared panel heater produces most of its IR rays in this optimum spectrum. EMBER panels produce 99,82% of its output in the C-range and more than 90% of it in the optimum spectrum of it (6 to 10 microns, see test report from Seibersdorf Laboratories, Austria).
EMBER reaches this optimum spectrum with a patented formula of a very high grade Carbon Nickel mixture (developed by Austrian technicians) and a Nano Silver conductor (developed by Japanese technicians). All coated by dielectric layer and 100% PE protection. A unique reflector technology emits all IR to one side (no loss to backside, backside gets hot but no IR rays to backside).
Ember Wavelength chart is attached.