If your aircraft is equipped with two radios, you can always listen to your controller on one and the CTAF on the other, then swap over to transmit on the CTAF and hit the button a few times while never leaving your controller's frequency. Just remember to always know which radio you're transmitting on.
It's the same way you got the weather at your station (you did that before needing the lights, right?) You listened to the weather on your second radio, why not swap it over to CTAF and hit the lights? Only difference is that you swap over to transmit on the second radio rather than just receive.
If you've only got the one radio, you can request to change frequency to get the weather and you can hit the lights for the first time. Just remember to reference the frequency you wrote down to contact the controller again and let him know you're back with him.
Lastly, if you're close enough to your airport you could cancel flight following since you should be monitoring and/or talking on the CTAF anyway at that point. Then just hit the button to make the lights stay on.
You have options! Do what feels safe and makes sense to you.