While I don’t think playing golf at night makes much sense these LED Golf Balls ($29.95 for 4) are still pretty neat. The 4-pack includes one of each, green, red, white, and blue. If you happen to live on a nice hill or have acreage they might be fun for launching off the deck at night. They stay lit for 8 minutes at a time and the battery lasts for 40 hours of light.