Re: rule of thumb for relamping please Top Drop only works if the unit uses the same lamps in both canopy and bench. If yes, this is a nice way to give strong lamps always - switch at about half life.
Never change based on a time period - e.g. annually.
Tie to performance - either meter or track hours and approximate.
Rule of thumb for those tracking hours -
100W lamps - 600 hours
160W+ lamps - 400 hours |