I got hit by a pickup truck in a walmart parking lot and, he broke my leg. I have no insurance and, he has no insurance.

Walmart has a built in defense that the conduct of some other person cause in whole or in part your damages. Contact a lawyer to see if a personal injury attorney in Miami will take you on. Negligent lighting will be a matter of proofs, but the hill you have ahead is steep.

Good luck to you.

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You may be able to file a claim against wal mart under a premises liability theory. Specifically, the design and/or lighting of the parking lot was insufficient and caused an unreasonably dangerous condition.

In addition to the good advise that you have received here, you may want to look into whether Walmart carried "medical payments coverage". If so, they may be able to pick up some of your medical expenses related to the accident, irrespective of negligence