Bags are useless for lights; they offer very little protection and you cannot stack anything on top of them making them a pain in the a-ss to transport. I used a Martin bag to transport my first Acrobat until the ata cases were built and it was a disaster waiting to happen. I would NEVER recommend using bags to transport your gear.
I tend to agree. I found that if my lights get scuff marks, I can just shoot em with BBQ grill paint and they are good as new. The light bags are an added step. Road cases for everything as applicable...