Photostability of commercial sunscreens upon sun exposure and irradiation by ultraviolet lamps

BMC Dermatology

Table 2 The dose of natural UV radiation the investigated sunscreens received

Sunscreen	Exposure time (min)	UVA radiation (kJ/m²)	Erythemal effective radiation (J/m²)	SED
1	30	54	**
	90	180	**
	120	260	**
2	30	54	100	1
	90	180	410	4.1
	120	260	610	6.1
3	30	65	140	1.4
	90	210	530	5.3
	120	280	730	7.3
4	30	65	**
	90	210	**
	120	280	**
5	30	**	**
	90	**	**
	120	210	**
6	30	47	140	1.4
	90	140	300	3.0
	120	210	370	3.7
7	30	65	150	1.5
	90	130	320	3.2
	240*	570	1500	15

Data from the Swedish Metrological and Hydrological Institute (SMHI)
* The exposure time for Sunscreen 7 it was 30 min, 90 min and 240 min due to technical obstacles
** Data not available due to technical obstacles at SMHI.

ISSN: 1471-5945