Example 4 sometimes returns negative values for UV index values

[mhord]

When light level is intense enough, UV index values are negative. This happens with indoor LED lighting.

[jimblom]

This probably means the A, B, C, and/or D coefficients probably need to be decreased. It would be nice if the example/library automatically re-calculated these if the value goes negative. May be tough to do without knowing the amount of IR component in the source light, but I'll play around with it.

[Avamander]

I noticed this too, too much infrared/light and the values go negative. This is especially bad when the sensor is covered by something that absorbs some amount of UV.

[aaz260]

Just checking to see if anyone resolved the UV Sensor values going negative issue?