Those will most likely burn out from excessive heat due to all the diodes on that small space that isn't cooled properly. Don't expect too much from that type of design in terms of lifespan, though they might be bright compared to a w5w bulb.
Maybe so but they do come with a two year warranty. What's a w5w bulb? A regular
halogen 194?
I also put some of these Sylvania Zevo LED's for the backup lamps.
Very bright bulbs with a heavy heatsink.