a scale of 0 to 10+, with 0 indicating minimal exposure and 10+ indicating very high and dangerous UV levels 0-2 minimal, 3-4 low, 5-6 moderate, 7-9 high, 10+ very high.

THE UV SUNMATE alerts the user of a possible over-exposure to ultraviolet rays from sunlight.

Easy to understand and you do not need any technical background.

the LEDS indicate the UV levels .

the chart  is :1 LED (minimal ) 2LED (low)  3LED (moderate)  4LED(high)  5LED(very high)