I have had these lights or similar led lights for the past couple of years. I use the exact setup you are using. My lights have a remote to change the colors and I can actually fade the colors to any hue in the color spectrum. They also have different settings pre programmed that will change the colors like dancing Christmas lights. I am very happy with these lights. I have not had any issues with the weather affecting the integrity of the light. There are two issues worth noting. One issue is actually with the ground stake. You must remove the rubber weather sleeve that keeps the water from getting into the fixture. Unfortunately this is necessary because you can't get the light bulb into the ground stake with the rubber in place. Now, by removing the rubber it creates another problem of allowing water to pool inside the ground stake fixture. I have actually poured water out of each fixture after it has rained or after my sprinklers activated. I was concerned that the water would cause the fixture or the bulb to rust over time. But that has not happened. I have had these lights for three years now. The second and biggest issue with this setup happens when the water pools in the fixture while they are on. When the water gets in, it will trip your GFI and you will need to pour out the water and reset you GFI. This has happened to me numerous times because I have my sprinklers set to activate at 10:30 pm several days a week. If you don't have GFI outlets it will probably trip your breaker when they get wet. These particular lights are more of a spot light type of light. They are different than the older flood light single color lights. The flood lights will light a greater area than these led lights. I just compensated by using more led lights.