If you need to do some serious nighttime spotting, you can make a powerful spotlight using a flashlight focusing light through a large magnifying glass.
YouTuber and Instructables user NightHawkInLight shows how you can put together the device with some Velcro straps and some wood planks to hold it all together. NightHawkInLight uses a 5" diameter magnifying glass, but the bigger the lense the better. Once you have the support structure assembled, attach the flashlight with the Velcro and start spotting. For complete step-by-step instructions, check out the link below.
Turn a Flashlight Beam Into a Far Reaching Spotlight [Instructables]