T12 , T8 ,T5 fluorescent lights? How do u tell?

Is there a place somewhere on the fixture that tells u whether they are T5's or w/e?

T5=5/8 in.
T8= 1 in.
T12=1.5 in.

gripngrace said:

T5=5/8 in.
T8= 1 in.
T12=1.5 in.

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ah ok, so its the size of the bulbs then?

and ballast but yes the best way to tell is the bulb diameter which is exactly as gripengrace posted

is a T8 better than a T5 because it is bigger?

one2threeBUDS4 said:

is a T8 better than a T5 because it is bigger?

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No, not usually. T-5's usually put out more lumens with less heat. When it comes to flo. tubes, bigger isn't always better.