You can make a pretty visible flagpole light with a simple piece of lexan tubing and some RGB lights from http://amzn.com/B00DTOAWZ2 and a controller http://amzn.com/B009C2Z3D6 and of course a 12vdc power source Amazon.com : Talentcell 12V DC Output Lithium Ion Battery Pack For LED Strip/Light/Panel/Amplifier And CCTV Camera With Charger, Multi-led indicator Black (3000mAh) : Camera & Photo or just buy them pre-made from GlowWhips - Safety flags | ATV flags | LED Antenna Topper | Lighted Whip Pole