LEDs used in Morita, D., Nishida, Y., Higuchi, Y., Seki, T., Ikuta, K., Asano, H. & Ishiguro, N. (2016) Short-range ultraviolet irradiation with LED device effectively increases serum levels of 25(OH)D. Journal of Photochemistry and Photobiology B: Biology, 164 256–263.
Purchased: 01/2016