With my company, it is about the same as Denti has written. The books require the landing lights on from the beginning of the takeoff run up to FL100 and again descending through FL100 until vacating the runway; type dependent, the taxi light or on the DH8 the Flare light (the innner landing lights that are tilted a bit more downwards) and the Taxi Light come on upon reception of the takeoff clearance until gear retraction and upon reception of the landing clearance with the Flare Light going off together with the landing lights and the taxi light used until coming to a standstill.
This is of course only the minimum requirement and it is by all means not forbidden to use the lights in other situations if deemed necessary to make ones presence more obvious. For example when sharing the airspace with VFR traffic (airspace category E comes to mind here!), in a holding or as well in some rare occasions on the ground e. g. when preparing for an intersection takeoff a bit down a long runway and seeing a landing traffic trying to turn head-to-head into the exit You are just waiting in.