I have run both Blue Batmobile, blue fog light overlays and currently have the complete blue headlight & fog light protection from rockblocker.
I was happy with bats for about a year. Then they started to dry out and crack and chip. AZeli73 had his melt to the fog lenses.
If you are going for inexpensive and just want something cheap to change the color of your lights then Blue Batmobile is perfect. I was really happy with them for the first year. They did change my light output to a noticeable blue light.
I have blacked out my headlights and have the blue rockblocker rock protection. I see no change in light output. In fact they appear to emit a whiter light. I have changed to a cool blue headlight bulb and have a blue headlight beam, but my fogs are still stock bulbs.
I have chips in my headlights and the rockplocker protective film actually filled in those chips so they aren't noticeable standing next to my car.
I know where the chips are and I have to search for them now.
Both products are good and both venders are awesome to deal with. I have great respect for both. But from personal experience I like the rockblocker better. It offers a color change with exceptional protection.
Here are some pictures for ya.
Smoked fogs from Bat
Blue overlays from Bat
Rockblocker:
Before pic
After
both cars have blue rockblocker over blacked out headlights
Some more rockblocker pictures
Below you can see the light output on the tan wall. cool blue bulbs in the headlights and stock bulbs in the fogs.
To end this here is the rockblocker smoked (one piece) P5 tail lights
EDIT:
Andrew or Chad feel free to use any of these pictures on your website that represent your products.