thank you for all advice.
the furthest lamp is maybe 25m away from the transformer.
i don't have the option of making the distance between the each light and the transformer the same - due to where the plug is.
from the advice.... can i clarify: if i replace with a thicker cable - maybe...
i have fitted some garden low voltage lights. i have two circuits - each with 4 x 20w lamps.
the transformer is rated as 8amps.
the flex that was supplied was too short for where i wanted to place the lamps...so i have used 3amp as it is only 80watts going through it.
the circuit is...