No, these LED lights are not classically dimmable.
Only our "dimmable C9" retrofit bulbs are specified as dimmable.
You can find them specifically in this category.Dimmable C9 LED bulbs
(You have to purchase these bulbs separately from their cords and install them yourself.)
These Green lights strings work great in animation but aren't "dimmable".
Hope that helps.
Let us know if you have additional questions.