try to stay away from ebay LEDs, mainly the ones from china.. yes they look like a good deal but are GARBAGE, if they get cold they lose their flexibility, and if you try to flex them they can snap, and sometimes LEDs in the strips can burn out
i only use oznium LEDs, i had a local who wanted cheap LEDs so i bought the ebay ones for him, didnt last more than 6 months
if you DO go with ebay LEDs, try to get the type listed above and not the silicone strips, those are the ones that will snap, but the ribbon strips will hold their flexibilty a very long time, but ive never used that type of LED strip