A sphere/ball of light hovering above the water.

We were on the lake in our kayaks waiting for the full moon to rise. It was about 8:35, the moon was supposed to rise at 8:45. The sun set was at 7:58 pm. My friend noticed a bright yellowish/white light on the water up the river from us. I responded that it’s probably a boat. The foothills surrounding the lake were blocking the moonrise so we had to keep waiting. We were slowly drifting towards the dam and there was a nice breeze. You can see the lights on the dam very well from that position, but the ball of light was coming from the other direction. My friend mentioned it again so I stared and thought it was odd, that a boat should have red/green bow lights on it and this didn’t. This thing was just a ball of light and it was silent, no boat motors. The moon finally peaked over the foothill and we were distracted taking pictures of the moon. We have pictures of the moon with the light on the water in it, I will include. Around 9:20 we started paddling back to the kayak launch at the dam and the ball of light was then moving slowly in our direction. We pulled our kayaks out at the launch and loaded them onto our vehicles. Then we took a couple more pictures of the moon. The light was there in one picture, then my friend suddenly said where did the light go? It had disappeared within seconds. We were once again distracted with the moon and not sure how the light disappeared. It wasn’t a boat, waverunner, or hovercraft because it was silent. It’s hard to judge the size because it was light. It moved VERY slow but steady. As soon as we noticed it disappeared, we jumped in our vehicles and left. It was about 9:45. I’m including three photos. One when it was up river and we first noticed it. One when it was nearing us at the dam and the shot right when it disappeared.