However, use of these plugs without a transformer or voltage converter can result in fireworks. The voltage in Europe is twice that of the voltage in the United States, and while many electronics are designed to adapt to voltage changes, it is crucial to check. If the device is not capable of handling 220 volts of electricity, it will fail.
By the time the ducklings are 3-5 weeks old, weather-dependent, they can spend warm, sunny days outside, carefully supervised and protected from predators. Until the ducks are fully feathered around 7-9 weeks old, they have trouble regulating their body temperature and need heat.
Ducklings are hardier than chicks so their temps don't have to be as high as long but they still need warmth. Mine went out at 5 weeks almost fully feathered with temps in the 60-70's and I still put out a 60 watt bulb for heat during the day and I had another larger one for nights. moved my 3 ducks outside at 2 weeks for the same reason. we didnt use a heat lamp but they are housed with 2.5 mo old chicks to help stay warm. the temp has dropped into the low 40's and the birds have been fine outside for 2 weeks now. as long as you have the heat lamp they should be fine.