Fantastic product which does exactly what it says! I bought a set of these last December and put them up in our tree - they are still there shinning away every evening. They last through the whole night in the summer and only start to dim around 4 am in the winter months when there is less light. I am definately going to buy more of these for the christmas season - they are going to save me a fortune in electricity and no more lengths of cable trailing into the house! Absolutely brilliant!