Colourful LED Solar Floating Light for Pool, Pond or Garden outdoor decoration with Remote

Solar pond lights are lovely with their changing colours but although they are in full sun all day they will only light up for approximately 2 hours at night. We have had a few cloudy overcast days. How do I get the lights to last longer? Pamphlet states 12 hours light time.

Solar pond lights are lovely with their changing colours but although they are in full sun all day they will only light up for approximately 2 hours at night. We have had a few cloudy overcast days. How do I get the lights to last longer? Pamphlet states 12 hours light time.

Very good quality materials. Nice led light.