hello! I'm getting ducks this week (day old ducklings) and I'm a little confused about the heat lamp situation. where I live it is very hot and the lowest temperature in the next month or so during the day is probably around 85. I know that the heat lamp should be set at about 90 and decreased 5 degrees every week or 1 degree every day. I plan on using a heat lamp at night definitely but what about during the day? should I still use the heat lamp even though the overall temperature outside will be equal to that or more? thank you!