No transformer needed. The 3 Volt Lithium watch style battery can replaced (#HW2300) and each will last up to 80 hours. Plan them for a spot you can easily reach to flip the switch on and off.
LED Dollhouse Lights
6 Arm Renaissance Crystal Chandelier LED
Reported Stock: 2
Vendor: Aztec MiniaturesModel: HW2361
$295.95LED 3-Arm Frosted Down Tulip Shade Chandelier
Reported Stock: 4
Vendor: Aztec MiniaturesModel: HW2321
$48.95LED 3-Arm Silver Frosted Down Tulip Shade Chandelier
Reported Stock: 3
Vendor: Aztec MiniaturesModel: HW2360
$57.95LED 5-Arm Frosted Down Tulip Shade Chandelier
Reported Stock: 4
Vendor: Aztec MiniaturesModel: HW2323
$79.95LED Antique Gold & Pink Tulip Lamp
Reported Stock: 2
Vendor: Handley House MiniaturesModel: HW2362
$25.95LED Copper Double Frosted Fluted Shade Sconce
Reported Stock: 1
Vendor: Handley House MiniaturesModel: HW2328
$40.95LED Copper Large Glass Frosted Tulip Table Lamp
Reported Stock: 4
Vendor: Aztec MiniaturesModel: HW2326
$24.95LED Double Frosted Tulip Wall Sconce
Reported Stock: 2
Vendor: Handley House MiniaturesModel: HW2332
$37.95LED Fancy Clear Ceiling Lamp w/ Ribbed Plastic Shade
Reported Stock: 11
Vendor: Aztec MiniaturesModel: HW2336
$24.95