I didn't seen any evidence that the packaging had been opened before, but none of the bulbs were shrink wrapped/sealed. I ordered all of them online from Petsmart (I don't have one near me). You're absolutely right about needing the 6.2 readings to get a feel for the actual output ranges/safety. Until I can get my hands on one though, these readings will have to be better than nothing and taken with a grain of salt. I'll update my Solarmeter thread with all of the results when I'm done going through all of the bulbs, hopefully tonight. One thing to note with the tube lights is that I have a Slimline T8 fixture with a reflector. http://www.amazon.com/Energy-Savers-Slimline-Terrarium-Fixture/dp/B0002QI86U