stevez said:Those might be an infra-red LED with companion receiver.
Lasers do seem to be well regulated because of the dangers however low power versions appear in low-cost, everyday items. I purchased a laser level - the range is at least 500 yards - for very little money - very low power. Laser diode pointers have been quite popular here for many years. There is usually a warning that you should not look directly into the beam but otherwise they appear to have been judged safe enough for the average consumer.
I've got to wonder if some separate versions aren't available for use in security applications as a replacement for the old light, lens and photocell arrangement.