LED disco

[Rob1500]

Hello
I have replaced six MR16/GU5.3 halogen bulbs and transformers (one on each light) with MR16/GU5.3 5W LEDs and drivers (one on each light 0.5-12W).
When I flick the switch it is like a disco with five of the lights continually flashing on and off. The sixth bulb stays on.
I'm no electrician but this was meant to be a straight swap as far as I was aware. What is happening?!
I know there is an option to go GU10 and avoid the need for drivers but as I already have them may as well do it this way.
These lights are operated by three seperate switches if that makes a difference.
Any advice would be greatly appreciated.

 

[333rocky333]

Lamps not compatible with the Drivers , is the usual cause, are they on a Dimmer.
Do they all flash in sync together or random

 

[Rob1500]

Hi
Not on dimmers. I have used the same lamps with the same drivers for a 3 bulb swap elsewhere and was fine. That was from a single switch.
They flash in succession one after the other, like runway lights!

 

[333rocky333]

Strange, maybe the mains voltage is low, however Drivers usually have a wide supply voltage range

 

[Rob1500]

Seems the one bulb that was staying on was 600mA rather than 580mA for the flashing ones, same in every other way though. Changed them all to 600mA and now thay are all working properly!
Any explanation for that?