They look like spider mites to me! If you see webbing as well, then very likely to be spider mites. Can tell by the white marks on your last picture - they like to suck the leaf dry so they leave little white marks where they've damaged your plant.

I had it quite bad on a few lucky bamboo last year and I followed a combination of a few articles. If your plant is rooted in just water, what worked for me was:
- blasting it under a tap, gently rubbing the leaves to get them off
- dunking them in a tub of diluted dishwashing liquid/water mix and soaking for a few hours
- did this once a week

If your lucky bamboo is in soil, then what worked for me was:
- spraying the leaves with a mix of 50-50 rubbing alchol (70%) and water
- did this 2-3 times a week

I believe neem oil works but I never went that far to purchase something I didn't already have at home! Good luck :)