I bought 2 pairs (4) of these on clearance 2 years ago. Mine are still blinking brightly, even after surviving a NE blizzard last February & covered in snow for over a week. They are still blinking wildly from dusk til dawn this summer. I can't say the same about the others I gave as gifts, one to sunny CA & FL and others to parts of Mass. Theirs seemed to have died completely even after a battery change. Death is sudden & unrelentlng, unfortunately. If on sale, this is so worth the beauty it renders, even if it's only for a year or so.