The construction of the megaray bulbs(also t-rex, same bulb) is the most sturdy I have seen in MVB's available in the U.S., so it would be the least sensitive to bumping around, as long as it doesn't get completely mishandled and thrashed, it should be fine. They typically don't burn out before it is time to replace them. I have had only one fail,and it was over 18months old and still producing high levels of uvb(that was an EB model and it started flickering and blinking around the same time the uvb output started to decline). I have a meter and have had most megaray bulbs last about a year, as far as uvb output goes,although I would lower the bulb a bit as it ages. 100 watt bulbs seem to decay slower than the higher wattages and the 60 watt EB lasts the longest, generally. With a meter you can get the longest use and be sure they are still beneficial, but they should not need to be replaced any sooner than at least 6months in any case.

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