Both the Illuminating Engineering Society of North America (IESNA) and the International Commission on Illumination (the CIE) are currently updating their Photobiological Safety Standards. Special application standards are also being developed, and balancing benefits with risks often becomes an issue. Also, the photobiological effects of light on human health have become a very active area of biomedical research. Although we do not understand all effects as well as we would like, there are product applications now based upon current knowledge, where there has been a call to examine potential limitations and understand potential risks. The CIE has had several efforts to review health aspects of visible light upon the neuroendocrine system mediated by the newly discovered retinal photoreceptors—the photosensitive retinal ganglion cells. Through this ganglion-cell pathway, light influences our circadian rhythms and the endocrine system. Beneficial uses of light in phototherapy to correct circadian disorders or mood disorders must be balanced by a careful review of potential side-effects and potential retinal hazards. Although the biological effects of ultraviolet radiation have been studied for decades, there continues to be a debate with regard to obtaining an optimum balance of preventing excessive exposure that increases risks of delayed effects upon the skin and eye, while at the same time having the benefits of low-level UV in producing Vitamin D and possibly obtaining other positive effects for the immune system. To best understand benefits and risks it is highly useful to examine just how humans are exposed in the natural environment and learn lessons that may benefit the application of artificial lighting upon human health, as environmental exposure to daylight UV was considered in deriving emission limits for lamp products.

1.
Sliney
,
D.H.
, “
Hazards from High Intensity Lamps and Arcs
,”
Proceedings of the NASA Medical and Environmental Health Meeting
,
Cambridge, Mass.
, (
14 October 1970
).
2.
Brunt
,
D.
, “Sunlamps: Putting Safety First,” FDA Consumer, Publication No. 78-8063, (March
1978
),
US Food and Drug Administration
,
Rockville, MD
.
3.
Sliney
,
D.H.
and
Wolbarsht
,
M.L.
(
1980
)
Safety with Lasers and Other Optical Sources
, Chapters 22 and 23
New York
,
Plenum Publishing Corp
.
4.
Franks
,
J.
, “Potential ocular and skin hazards from lamps and projectors,” in (
Grandolfo
,
Rindi
, and
Sliney
, Eds.),
Light, Lasers, and Synchrotron Radiation – A Health Risk Assessment
,
Plenum Press
,
New York
, pp.
233
236
, (
1991
).
5.
Sliney
,
D.H.
,
Fast
,
P.
,
Ricksand
,
A.
,
Optical radiation hazards analysis of ultraviolet headlamps
.
Applied Optics
,
34
(
22
):
4912
4922
(
1995
).
6.
Ham
,
W. T.
Jr.
, (
1989
) The photopathology and nature of the blue-light and near-UV retinal lesion produced by lasers and other optical sources. In:
Wolbarsht
,
M. L.
, ed.
Laser Applications in Medicine and Biology
.
New York
:
Plenum Press
; pp.
191
246
.
7.
ACGIH
(
2010
),
Documentation for the Threshold Limit Values, American Conference of Governmental Industrial Hygienists
,
Cincinnati, OH
.
8.
Pitts
,
D. G.
,
Tredici
,
T. J.
,
The effects of ultraviolet on the eye
,
Am Ind Hyg Assn J
,
32
(
4
):
235
246
(
1971
).
10.
Sliney
DH
,
The Merits of an Envelope Action Spectrum for Ultraviolet Radiation Exposure Criteria
,
Amer Industr Hyg Assn J
.
33
(
10
):
644
653
, (
1972
).
11.
Olsen
,
R.L.
,
Sayre
,
R.M.
,
Everett
,
M.A.
Effect of anatomic location and time on ultraviolet erythema
.
Arch. Derm
.
93
(
2
):
211
215
(
1966
).
12.
Lytle
,
CD
;
Cyr
,
WH
;
Beer
,
JZ
;
Miller
,
SA
;
James
,
RH
;
Landry
,
RJ
;
Jacobs
,
ME
;
Kaczmarek
,
RG
;
Sharkness
,
CM
;
Gaylor
,
D
; et al. (
1993
).
An estimation of squamous cell carcinoma risk from ultraviolet radiation emitted by fluorescent lamps
.
Photodermatol Photoimmunol Photomed
,
9
(
6
):
268
74
.
13.
Bergman
,
RS
,
Parham
TG
,
McGowan
TK
,
UV emissions from general lighting lamps
,
J Ilium Eng Soc
.
24
(
1
):
13
24
,
1995
.
14.
Commission International de I’Eclairage (CIE). Photobiological safety standards for lamps
.
Vienna: CIE; Report of TC 6-38; CIE 134-3-99
;
1999
.
15.
International Commission on Non-Ionizing Radiation Protection (ICNIRP)
,
Guidelines on Limits of Exposure to Ultraviolet Radiation of Wavelengths Between 180 nm and 400 nm (Incoherent Optical Radiation)
.
Health Physics
87
(
2
:
171
186
;
2004
.
16.
CIE (Commission International de I’Eclairage, the International Commission on Illumination)
, CIE Standard S-009E-2002,
Photobiological Safety of Lamps and Lamp Systems, Vienna, CIE
. Joint-logo standard with IEC as: IEC64271-2006.
17.
ICNIRP
,
UV exposure guidance: a balanced approach between health risks and health benefits of UV and Vitamin D. Proceedings of an International Workshop
.
Progress in Biophysics and Molecular Biology
, Vol
92
, Number
1
; September
2006
– ISSN 0079-6107.
18.
Sliney
,
D.H.
,
Comparing LEDs with other lamps and lasers
.
Proceedings of the CIE LED Symposium 1997 on Standard Methods for Specifying and Measuring LED Characteristics
, 24-25 October
1997
,
CIE Central Bureau
,
Vieima, Austria
, Abstract p.
2
, Full Paper, pp.
77
93
(
1997
).
19.
International Commission on Non-Ionizing Radiation Protection (ICNIRP)
(
2000
)
Statement on light emitting diodes (LEDS) and laser diodes: Implications for hazard assessment
.
Health Phys
.
78
(
6
):
744
752
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