Bought the basic AR0506 LED PIR BULKHEAD bulkhead LED unit . I have a prior LED unit installed on the same line, but this one is different and not functioning. 1. when you apply power, it does not come on for a few seconds to warm up as per the manual 2. when you do the 3 second off-on-off-on , for an always-on security light mode, it does not go into the always on mode 3. if I hold my hand completely over the sensor for a while, it turns on until you take your hand away -so my wiring is perfectly fine! 4. if I hold a rag over the sensor for a minute (this is at 10pm in summer) it does not come on when I unblock the sensor I did not see anything in the packaging about a manufacturer guarantee, I am keen to just order another, since it's about 20 quid and all the reviews are positive. Am I being too charitable?