I´ve experienced the same issue, first thought was i made something wrongjui wrote:My lights working fine http://i.imgur.com/6OwrFLG.jpg but the green light points up in blender and the red one points down in blender so its upside down ingame, thats what i mean.
Also the light settings in blender do not have an effect for me (besides position ofc) only the settings in xml count, but thats fine. Tho i have not tested it in detail. In blender i only add the light and set the position anything else i do in the xml.

I used the ConvertAssistant for importing.
But if nadeo decides to solve this, will our already made models got the correct lights than??