[jotux]

Ya, they're not designed as detectors so there's no control over the parameters that determine how good they are as detectors. Interestingly, one of the reasons I was looking at light sensors was because our pyroelectric sensors were erratically sensitive to incandescent light. We wanted a reliable way to detect bright light and mitigate the effects in software and were hoping to use an existing component on the board as a sensor (our products were extremely cost sensitive due to the volume, so adding a $0.12 sensor was actually a huge deal).