What can go wrong if I wire it incorrectly with ground being right but hot and neutral reversed?
In general appliances don't care which way around live and neutral are. I don't think anything will go wrong. Here in Britain, on 240v, we use a 2-pole 'bayonet mount' for most light bulbs, including LED and CFL, and when you insert the bulb in the holder it's 50-50 which way around it's going to be connected. Either way the lamps light. (If the lampholder is metal it must be grounded, and so the exterior of the bulb base is never live).
My LED strips under my kitchen cupboard have non-polarized "figure 8" connectors for the AC and they don't care which way around live & neutral are either.
A quick question - is this the story: the lamps have terminals marked L and N, but the instruction leaflet says Live is blue, and Neutral is brown?