I'd like the words Freight Dynamos to represent power (a dynamo is a machine that generates power by converting mechanical energy into electrical energy such as a generator, windmill, etc.). 

Both words can be all caps or just the F and D can be capitalized. I'll see which look I like best. 

One idea is that both words can have a single thin lightning bolt going through them.  

Another idea is the F and D can represent lightning. 

I want something somewhat simple. Not too cartooney. Abstract is ok as long as the company name is legible. 

I've sent examples for reference, but you can also be creative on your own if you'd like. 

Thank you.