Having used t5s for over 5 years i agree with Fauna Marin that T5 tubes will loose a lot of spectrum within 6 months.
I have used almost every tube on the market and find that most tubes will use loose the spectrum.
When t5s firts came out they were suppose to last 5 years , this was all marketing hype. T5s will run for 2 yrs plus but the big thing is the spectrum loss after 6 months.
I find that some SPS corals dont do as well after 8-9 months.
I dont see the big deal about the chart anyway as they dont mean much to me and find the best way is to try the bulb out.
Has anyone heard of t6 bulbs? i understand these are going to be better than t5s.