Figure 5. Light penetration in the skin

(attenuation down to 1% occurs for light wavelengths of 250-280 nm at around 40 μm depth; for 300 nm at 100 μm; for 360 nm at 190 μm; for 400 nm at 250 μm; for 700 nm at 400 μm; for 1.2 μm at 800 μm; for 2 μm at 400 μm; for 2.5 μm at 1μ; and for 400 μm at 30 μm)

Source: SCENIHR, Health effects of artificial light, 19 March 2012,
 3.4.1 Optical radiation and 3.4.2 Radiant energy absorption, pp. 22-31.

Health Effects of Artificial Light

Figure 1. Electrical lighting sources technologies

Figure 2. Wavelength regions in optical radiation

Figure 3. Chromophores and their absorption bands (adapted from Jagger 1967)

Figure 4a. Interaction of UV radiation with the human eye at all ages (adapted from Sliney 2002).

Figure 4b. Specificity of optical radiation interaction with the eye of children below 9 years of age (adapted from Sliney 2002).

Figure 4c. Optical radiation interaction with the young human eye (10 years old up to young adulthood) (adapted from Sliney 2002)

Figure 4d. Optical radiation interaction with the eye of an aging human (adapted from Sliney 2002)

Figure 5. Light penetration in the skin

Table 1. Lamp parameters supplied by the European Lamp Companies Federation

Table 2. Overview of the classes of photodamage to the retina

Table 3. Interaction of light with eye tissues and chromophores

Table 4. "Light related" skin diseases

Table 5. Wavelength dependency in photosensitive diseases

Table 6. Examples of exposure situations from artificial light for the general population

Table 7. Percent increase in SCC incidence and risk at 80 years of age due to certain added UV doses

Table 8. Estimates of SCC risk

BOX I: Metrics of optical radiation and (bio-)effectiveness

Figure 6. shows the typical adverse effects of light on eye tissues as a function of wavelength.

Figure 7. Production of reactive oxygen species (ROS) by rod photoreceptors exposed to blue light in vitro (adapted from Yang et al. 2003)

Figure 8. Photosynthesis of vitamin D3 and further metabolism (adapted from Dutch Cancer Society 2010)