I tend to agree with Chuck, perhaps the newly found need for operation of landing lights is symptomatic of a problem with the system.
For what it's worth, the operator who said that using landing lights butns them out too fast may seem a bit tightarsed, but the fact is that they are not designed for continuous inflight operation, and will therefore not last very long at all if used all the time. Even when they are used within their design spec, they still don't last very well.
Methinks someone has shares in a light bulb company
