I have a fixture with 4 MR16 (two pin) halogen bulbs. If I replace 2 of the halogen bulbs with LED's all bulbs work. If I replace 3 halogen bulbs with LED's all the bulbs act like a strobe light (not flickering because it is a constant on/off pattern). If I replace all halogen bulbs with LED's none of the bulbs work.
The fixture does not have a dimmer.
Best Answer
The problem is likely a mix of old and new technology: the power supply for the old halogen incandescent lamps is a newer electronic converter, rather than a transformer. Some of these converters have a minimum current for operation, which the LED's don't meet.
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