Nienna, over the last 6 months I've also been practicing in different directions (NO, exercising, diet, and the infrabed-inspired contraption below) but I couldn't tell which measure is responsible for which improvement.
Anyway:
Inspired by the beautiful infrabed and photobiomodulation in general, recently I built a device emitting in the range from 660nm (red) to 950nm (mid infrared). Results after 2 months of daily use are encouraging – my eyesight, peripheral blood circulation as well as skin “quality” have all improved significantly. Most of the stiffness, especially in my neck, is gone.
Here’s the reasoning that brought me to this experiment. I wanted an infrabed, only smaller (less is more), which I could use while working at my PC (5-7 hours per day), and which would emit a range of wavelengths.
I had a few cheap, ubiquitous “USB reading lights” sitting around which I had never used because they emit an unpleasant, cold white. So I thought about hacking one by substituting the white LEDs with hopefully more therapeutic ones
. I designed a PCB with the same dimensions and fitted it with 6 LEDs: 1x660nm, 1x730nm, 2 each 850 and 940nm. The pictures shows an original and a "hacked" one.
The 6 LEDs are arranged in 3 legs, each leg current-limited to about 70mA from the 5V USB supply. Power consumption is just over 1W, a far cry from the Infrabed’s 175W, but that’s not the whole story. The idea was to use much longer exposure times during work to arrive at a comparable daily dose. A good part of the modest 1W still manages to heat the plastic case. For this reason I mounted the PCB with heat-conducting paste on the backside, and potted with transparent silicone resin.
By plugging the device in a USB socket to the left side of my laptop, the light would shine on my face transversally, while I was working. So far so good. Weeks ago, working barefoot and in shorts in tune with the season, I added a second device with a USB extension cable and taped it underneath the desk, shining downwards on my lower legs and feet. The jury is still out on its efficacy, but I would speculate that it will help to improve blood circulation.
Notes: Although the illumination is not directly at my eyes, initially I found the 660nm to be a bit strong. So I built another one and sprinkled some plastic “sparkling” powder over the still liquid silicone resin for a more diffused effect, as shown. Alternatively I could have used the original milky white cover instead of the silicone resin, but I wasn’t sure how much this would attenuate the emitted light.
Conclusions: the goal was to have a net daily dose of a few J/cm2 on the irradiated skin. Accounting for the different factors like LED efficiency, radiation pattern and distance, a 6-hour exposure gives me a total of about 2J/cm2 . A direct comparison with the original infrabed (about 3J/cm2 in 10 minutes, ballpark estimate) is not really fair because the infrabed covers a much larger body area, albeit only with single 850nm wavelength. A photospectrometer would provide precise measurements, but I don’t have one.
Another thing, according to various sources the 730nm (far red) light has no noticeable biological effect. I therefore would leave that out in favour of a second 660nm LED.
Apart from the many asino
man-hours and the PCB setup charges, the thing came out really inexpensive. Material cost including the original USB white reading light, the PCB, LEDs, resistors plus heat conducting paste and silicone resin was well under 10 Euros.