Just finished some night landings after installing the Flyleds. I installed only one bulb per side (wingtip) to check out the brightness. I was very pleased with the brightness using just one bulb. Even better than the two bulbs that vans sells. My landings were much better and I was more confident since I could actually see the runway. Installation was somewhat easier than installing the Vans. Will be adding the second LED to each side soon.