Pentair Aqualite bulb replacement? Will this Feit work?

[FlyersDude21]

I have a Pentair aqualite and it looks like it takes a 120v 100w bulb.

I'm in a pinch and went to Leslie's and found this bulb which lines up but it's just a little bit shorter. Will this be okay to use?

 

[KenKasza]

Yes.