I’m from Ukraine, so normal power is a rare thing. Most of us forced to experiment with DIY crazy shit in the scale of our budgets. So I have a 12V battery with a charger and I have found a DC 12V lamp to save some power on AC-DC 12V-220V converting. Sitting with a light is better than sitting in the dark.
But I start noticing that lamp is emitting light much more dimly than before. It happened gradually through 1.5-2 years, so the first idea was to blame the lamp itself. Shitty lamp working almost constantly for 2 years might started dying. I checked voltage. 13V from the PSU with battery. Ok. Replaced the lamp (luckily I had an unused one from the same set as the dim lamp) and… the same shitty dim light. But I wasn’t completely sure that it was brighter 2 years ago. I could easily imagining things. Returned the previous 2 years old lamp. The light became much brighter. Almost as I remembered it.
Cleaned the contacts. All is nice now.
It looks like DC low voltage/amperage doesn’t work fine with E27. Oxidizing is more significant in comparison to AC 220V.
I hope my story is dull enough for this community :)
Dull but illuminating at the same time
Yeah low voltage allows build of of current affectors.
That’s why outside powerlines don’t really corrode.
25000volts is a decent cleaner haha
Also galvanic corrosion is much more pronounced with DC vs AC.
Dull like your light, but you cleaned it properly.
Also happens if your contacts aren’t solid, or if you’re going copper->aluminum
Just as info: The E27 just means that the mount type is Eddison with a 27mm base
