Short circuit, Security light

Hello there I was testing one of our security lights tonight with a fuse tester screwdriver, and by mistake I made a short circuit. Except the security light, everything else is perfect. I asked the owner of the house and she told me that she can not remember to see any fuse for that. I checked the fuse box and I did not see anything strange. So, I was wondering if you could kindly let me know how I can our security lights. I can provide you more information. Any help is highly appreciated. Regards Mohsen