Lightbox 2 and Slow Connections

I have installed Lightbox 2 Lightbox 2 for a client’s site redo, and we are concerned about the opening speed of Lightbox for those on a slower Internet connection. Lightbox is only for those visitors who want to see images in a larger view. Is this something we should be concerned about? Are their other choices that would be better?

Thanks so much!

Just checking–anyone have any input? Thanks!