Red light therapy - Page 1
Forum section: electronics / projects

author: Hextejas
author_rank: Frequent Contributor
timestamp: June 21, 2023, 11:39:48 am
content: The actual name is:Photobiomodulation or red light therapyI saw this device advertised as beneficial for a lot of things and it seems like an ideal candidate for a home project.They are expensive as I have seen 2 for sale at a minimum of about $600.00 for the small version.What say you all ?

author: Benta
author_rank: Super Contributor
timestamp: June 21, 2023, 04:59:31 pm
content: Can be done much cheaper.Just buy the lamps used to keep baby pigs or freshly hatched chickens warm. Must be available at farm equipment suppliers.Also used for sports injuries.

author: gnuarm
author_rank: Super Contributor
timestamp: June 21, 2023, 05:32:03 pm
content: Quote from: Hextejas on June 21, 2023, 11:39:48 amI have units that work much better and are only $500 for the large version. How many do you want?

author: Hextejas
author_rank: Frequent Contributor
timestamp: June 21, 2023, 09:38:18 pm
content: hahah,Yeah. I saw a bunch of less expensive devices. Fancy that.thanks

author: Zero999
author_rank: Super Contributor
timestamp: June 21, 2023, 10:29:22 pm
content: What wavelength?Incandescent lamps emit lots of mid-IR, which might be good or bad.LEDs are good for red. I've some claiming over 60% efficiency in terms of radiant power out vs power in. I can have a search, if you tell me the wavelength and required power.

author: TimFox
author_rank: Super Contributor
timestamp: June 21, 2023, 10:31:27 pm
content: A skeptical article from a professor at McGill University:https://www.mcgill.ca/oss/article/medical-critical-thinking/hype-around-photobiomodulationThere is a well-known "window" in human skin in the near-infrared (650 to 1350 nm) that is exploited in the now-ubiquitous non-invasive blood oxygen monitors ("pulse oximetry).

author: thm_w
author_rank: Super Contributor
timestamp: June 21, 2023, 11:58:49 pm
content: "Red light or near-infrared light (NIR) are the most commonly used wavelengths in PBM (600–1100 nm) . In longer wavelengths, 1064 nm is often chosen for studies and applications [14,15]. However, Wang et al. discovered that blue (420 nm) and green (540 nm) light enhanced the differentiation of human adipose-derived stem cells (hADSCs), highlighting the possibilities of translating this knowledge into novel future therapeutic approaches"https://www.mdpi.com/2077-0383/9/6/1724#B87-jcm-09-01724https://pubmed.ncbi.nlm.nih.gov/17069488/685nm 50mW healinghttps://pubmed.ncbi.nlm.nih.gov/19196113/808nm 100mW 12J/cm2 healinghttps://www.science.org/doi/full/10.1126/sciadv.abq32111064nm brainLEDs are available 600-700nm, should be safer than laser.Anyone know the claimed benefit of laser? I guess just spectral purity. The power level could easily be achieved with LED.

author: Zero999
author_rank: Super Contributor
timestamp: June 22, 2023, 05:41:52 pm
content: Luminous Devices make some very efficient deep red LEDs. Here's an example, claiming over 70% efficiency in terms of power in vs power out.https://www.mouser.co.uk/datasheet/2/245/Luminous_Device_6_8_2022_DRAFT_PDS_003216_Rev_01__-2950129.pdfNote I have no investments or interests in said company. I've used some of their 395nm LEDs and they're good. The only downside is they tend to make their products obsolete too quickly.

author: Georgy.Moshkin
author_rank: Frequent Contributor
timestamp: June 23, 2023, 04:28:22 pm
content: What about adding very bright white lamps? Or other colors should not be there in the spectrum?