They tell me they will LAST LONGER if they are used as ‘landing lights’ vs. ‘flying/driving lights’. Also, on my pre-buy, one side of the mount, the rivets had popped making it loose and subject to much vibration… check the security of the lamp mounting brackets. You probably already would have noticed such a problem during bulb replacement
Firstly, CONGRATULATIONS to you - I believe you’re the newest owner on the forum.
Rivets - all OK so far.
Use of the landing light - yes, but what theory says they fail when they’re not used? Landing light #1 failed in 5 hours, and #2 failed in 20 hours; both had been switched on for a total of < 30 seconds during preflight only!
Have you had a chance to fly yet? How about a PIREP?