Default Lighthouse Question

Howdy,Have placed a default (Library Object) lighthouse in a local New Zealand scenery that I've complied using BGLComp. However, I've subsequently discovered there is no light beam at night! (which kinda defeats the purpose of having a lighthouse there in the first place). Do I now have to include an attached object or trigger command with the Library Object (and if so, what would it be)? or do default lighthouses not light up at night? Enquiring minds would really like to know. TIA.