Retrofit brake lights? '01-'04

I want to retrofit some leds into my brake lights. I got these aftermarket ones and want to split them and put some leds in the turn signal area. But unsure of how they come apart. Either baking them or if they would have to be cut open. It looks like there's some kind of seal that goes around the lens. But I can't tell if it's a rubber oring type seal or just butyl. I don't wanna bake them and end up melting the seal if it's rubber. If I really have to I'll cut out the back. But I don't wanna do that.
Anyone know?

 

if those are just bolt on tail lights, you should be able to just look on the back where the turn signal is, twist and pull it out. then just pull the bulb out and replace it with the proper LED bulb

 

Yeah, but no, I want to retrofit custom leds inside. Like a panel of leds just like the brake light is. Meaning I would have to split the lens off.
I already have led replacement turn signals but they aren't bright enough. Was thinking of the superflux leds.. I believe that's the same type they use in these brake lights.

 

well im not sure about these tail lights, but when i unscrew my tail lights, the lens i can just pull right off, so maybe try that lol