I've had this light on a tank for over 1 year. It's still working. Nice light! Great value for $10.00.
Its adequate lighting for low light plants and has a great blue light feature for evenings. Since the arm moves on it, you can adjust the distance from the water.
You cant use this for a large area, or a deep tank... but for a small 2-5 gallon tank with plants that need minimal lighting to thrive, its a great light for the cost.