I have just replaced all of the halogen lamps with LED lamps from https://www.toolstation.com/shop/Lighting/d220/LED+Capsule+Lamps/sd3388/Integral+LED+G4+Capsule+Lamp/p58867
The original 10w halogen are now a straight swap for a 1.1w LED warm white or over the galley and chart table 1.5w LED I have gone from 11 x 10w (110w) to 13w in total. Reduced from 9.1 amps to 1amp per hour max. Plus 15000 hours life.