LED Shop Lights Installed!

I did my shop awhile back, I have the 7 foot florescent, I ordered my LED's from Amazon. I got the kind that you need to remove the ballast, was quite expensive for the bulbs, cant remember exactly, anyhow what people don't realize is its not only the bulbs that consume power but also the ballast, I could see the drop in my power bill. Have I really saved any money?? Not sure I have since had 2 out of the 10 7 ft LEDs fail and bought replacements. I do really like the brightness of them and the fact that they come on instantly when its cold as a witches tit outside.