I'm repairing a day/night sensing outdoor lamp circuit and need some advice.The photosensor in the lamp that won't cycle on/off is badly corroded so I took readings from the other side which still works.
The problem is my meter only goes up to 2 mohm and the total dark value is more than 2 mohm. The full light side seems to be 10k ohm held up to a 75 watt bulb so I have no issues measuring that.
I've found a 10k light - 20 mohm dark, 16k light - 500 mohm dark, 5k light - 20 mohm dark, should I just buy one of each and see wha happens when I swap them in? My guess is the 10k/20 mohm ought to work but I may as well hedge my bets for the extra couple bucks.