Where my T5H fixtures use individual bulbs, yours use tandem bulbs, two ties together at one socket. I think that's what you have. Your fixture with only a pair or bulbs is far more expensive than my 6-bulb fixtures and mine has more lumens, a lot more.
drdawg (Dr. Kenneth Ramsey)
The reason it's so hard to lose weight when you get up in age is because your body and your fat have become good friends.