Used to have four GU 5.3 50w 12v halogen spots over my workbench. Picked up some warm white 5w LED replacements from Lidl yesterday for €1.99 ea. Amazingly the Leds are brighter than the old halogens and the consumption in electricity should be about a tenth!
LED’s have come along in leaps and bounds in the last couple of years, similar to you I recently replaced a set of 4 35w GU5.3’s with 3.5W LED’s and they are as bright if not brighter for about 10% of the electricity !
I got mine from Amazon.fr in a box of 5 for €11.99 with free delivery so not quite as cheap as Lidl’s but then I didn’t have to drag my sorry ass out of a warm house to get them