Quik/Mike951, I have never overdriven my T5 bulbs. There's never been a need to. I'm using the standard ATI Powerbalken fixtures from Germany. The T5 ballasts are built-in.
Thanks Michael, Scleractinian, Project Reer, Mike951, Cesar.
yaktop, the auto shut-off Temperature Controller came as a DIY kit with sensor, electronics and digital display. It's available at specialised electronic stores locally.
Dan