Worked when it wanted to, not happy

Out of the 6 lights 2do not work

One is defective and I couldn't use it and somehow, its not eligible for return.

One light never worked, one stopped working after 4 weeks. The others seem to work well if they get enough sunlight.

These lights work well at first but dim down after a few months, after 10 months almost out.

One of the two doesn’t work at all