My shoplite said "RAPID START LAMPS ONLY" and "REPLACE BALLAST WITH RAPID START CLASS P BALLAST ONLY" stamped on the inside. I sprayed over it when i painted it though.
The ballast label was torn halfway by the previous owner for whatever reason. It's really eating me not knowing what knid of lights are in my great-aunt's tool shed. the power was cut a couple years ago and she said i can have them but I haven't been there in over two years! she said the strips in the garage are working fine which is good and so are the F20T12 tulamp preheat shoplites in the basement. ( i think there are two of them...)
So she has:
(2) F20T12 tulamp preheat shoplites
(1) F40T12 one lamp RS strip light
(1) F40T12 tulamp RS strip light
(1) F90T17 tulamp preheat parabolic fixture
(1) 8ft F40T12 tulamp wall mount fixture (either preheat or RS)
plus a couple or so fluorescents in the tool shed! And i can get them all if i replace them!
The ones in the tool shed don't need to be replaced though since there's no power to the shed which means i can also score on some receptacles and switches too.