Cheese
Member
Just curious if anyone here has measured the current draw of LED bulbs with a DMM? I'm finding some LED's will give an immediate average reading within a very narrow current range while other LED's start off at a high value and then continually decrease in value until they finally stabilize about 4-5 minutes later.
1. As an example, a particular PLT LED will have an initial average reading of 176mA and 1 minute later it will be 168mA...that's a narrow band and I'd trust the results.
2. On the other hand, a particular SRRB LED will have an initial average reading of 790mA and it takes 5 minutes for the current to stabilize in the 440mA region. The problem is I really don't know if that's the current draw or if it will continue to decrease if I continued to monitor it for a longer period.
Is this situation normal with LED's ?
If so, how long should I monitor each one to get a valid current reading?
1. As an example, a particular PLT LED will have an initial average reading of 176mA and 1 minute later it will be 168mA...that's a narrow band and I'd trust the results.
2. On the other hand, a particular SRRB LED will have an initial average reading of 790mA and it takes 5 minutes for the current to stabilize in the 440mA region. The problem is I really don't know if that's the current draw or if it will continue to decrease if I continued to monitor it for a longer period.
Is this situation normal with LED's ?
If so, how long should I monitor each one to get a valid current reading?
