For the headlights, GT Styling makes smoked headlight covers for our cars (part# GT0713) that you can snap on and off whenever you feel like it.
As for the taillights, www.summitracing.com sells a spray by VHT called Night Shades that is made for tinting tails. I would suggest you not clear coat the tint tho. After awhile the clear starts flaking off and make the tails look bad. I would just respray whenever the tint starts to fade.