Heat lamp question

[RollinWithTheStones]

Do you think it's okay to turn the heat lamp off now at night? Night temps are 50s and 60s.

My Cornish cross chicks are 3 weeks old and spend the days without the heat lamp.

 

[AlienChick]

I would still give them some heat at night.
It doesn't have to be intense heat like week-old babies; just keep 'em warm enough that they don't have to chill.