Davis Instruments 6152C manual UV Dose that, Causes Sunburn, UV Index

TABLE A-2: ENVIRONMENT CANADA SKIN TYPES AND

REACTION TO THE SUNA

Skin Type	Skin Color	History of Tanning & Sunburning
I	White	Always burns easily, never tans
II	White	Always burns easily, tans minimally
III	Light Brown	Burns moderately, tans gradually
IV	Moderate	Burns minimally, tans well
	Brown
V	Dark Brown	Burns rarely, tans profusely
VI	Black	Never burns, deep pigmentation

a.Developed by T. B. Fitzpatrick of the Harvard Medical School. More about the Fitzpatrick Skin Types is available in: Fitzpatrick TB. Editorial: the validity and practicality of sun-reactive skin types I through VI. Arch Dermatol 1988; 124:869-871

	1					I
			UV Dose that			II	Skin Type (Environment Canada)
			Causes Sunburn
Skin Phototype (EPA)	2		All Burn
						III
	Some burn
	3					IV
						V
	4
						VI
	20	40	60	80	100	120 mJ/cm2

1 2 3 4 5 6

UV Dose (MEDs)

UV Dose and Sunburn - Use this plot to estimate the MED dose leading to sunburn. A person with Type II (Environment Canada) skin type might choose

0.75MED as the maximum for the day; in contrast, a person with Type V (Environment Canada) Skin Type might consider 2.5 MEDs a reasonable dose for the day. NOTE: the Vantage Pro2 assumes a Fitzpatrick (Environ- ment Canada) Skin Type of II.

UV Index

Vantage Pro2 can also display UV Index, an intensity measurement first defined by Environment Canada and since been adopted by the World Meteorological Organiza- tion. UV Index assigns a number between 0 and 16 to the current UV intensity. The US EPA categorizes the Index values as shown in table A-3. The lower the number, the lower the danger of sunburn. The Index value published by the U.S. National Weather Service is a forecast of the next day’s noontime UV intensity. The index values dis- played by the Vantage Pro2 are real-time measurements.

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