CindyinSD
All will be well, and that will be well is well.
If the lid doesn't melt and/or catch fire (which it will), it will send off fumes. If you're not home you need to call someone who is there or can get there to take that lid off your lamp. It will be hot (unless you've got an LED bulb in it) so be careful. If you have an LED bulb in it, that's fortunate, because they don't heat up much--on the other hand, it won't warm your ducklings, either.
Also, brooder lamps come with a "cage" (just two half-circle curved wires) that fit over the opening of the lamp in a crossed formation. This helps prevent the bulb from contacting flammable surfaces--it's helpful but it doesn't always work, so extra-strict precautions need to be taken to prevent the brooder bulb from touching or getting close to anything that can catch fire. If it can be bumped by a pet or young child and caused to fall, that needs fixing. You seem like a very creative person. It's important that you imagine all the ways that lamp could cause a fire and prevent them. Lots of people... adults who ought to know better... have suffered house or coop fires because of brooder lamps. Please be safe!
Also, brooder lamps come with a "cage" (just two half-circle curved wires) that fit over the opening of the lamp in a crossed formation. This helps prevent the bulb from contacting flammable surfaces--it's helpful but it doesn't always work, so extra-strict precautions need to be taken to prevent the brooder bulb from touching or getting close to anything that can catch fire. If it can be bumped by a pet or young child and caused to fall, that needs fixing. You seem like a very creative person. It's important that you imagine all the ways that lamp could cause a fire and prevent them. Lots of people... adults who ought to know better... have suffered house or coop fires because of brooder lamps. Please be safe!