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Seems odd question but not as daft as it seems. With GU10 lamps often the voltage is given as 85 - 265 volt showing the range they will work on but with 12 volt it just states 12 volt it does not even say AC or DC.
Two issues one is 12 volt transformer seems the bulbs do not last very long and wonder if should be DC?
Second is caravan 12 volt nominal is anywhere between 11 and 14.8 volt mine is not at stage charger so 13.8 volts. Some do say will work with electronic transformer so clearly AC however my transformer is not electronic in any way.
Looking for 1 or 2 watt but can find halogen rated 13.8 volt (85W so would not really want these) but not LED and it would seem likely that with 12 volt a simple resistor is used but with 230 volt a switched mode power supply.
A 2W 12V lamp with AC supply would likely be driven to well over the 2W limit on the peaks tested LED's over driving at 2kHz pulse and worked OK but at 100Hz likely two long of a time to stand over driving.
But can't find any data. So question is has anyone used MR16 12v rated LED lamps at 13.8 volt DC and did they last? And have any other found using 12v LED in 12v RMS AC supply has caused failures or was I unlucky?
Two issues one is 12 volt transformer seems the bulbs do not last very long and wonder if should be DC?
Second is caravan 12 volt nominal is anywhere between 11 and 14.8 volt mine is not at stage charger so 13.8 volts. Some do say will work with electronic transformer so clearly AC however my transformer is not electronic in any way.
Looking for 1 or 2 watt but can find halogen rated 13.8 volt (85W so would not really want these) but not LED and it would seem likely that with 12 volt a simple resistor is used but with 230 volt a switched mode power supply.
A 2W 12V lamp with AC supply would likely be driven to well over the 2W limit on the peaks tested LED's over driving at 2kHz pulse and worked OK but at 100Hz likely two long of a time to stand over driving.
But can't find any data. So question is has anyone used MR16 12v rated LED lamps at 13.8 volt DC and did they last? And have any other found using 12v LED in 12v RMS AC supply has caused failures or was I unlucky?