Mine worked for almost 2 years then bam, all the sudden one went to only half side working only, then flickering like a strobe light to completely dead. Not to hate on diode Dynamics, I have tons of their products, customer service is awesome, this is just a PSA.
Good luck with those side led markers, I'm on my 5th set, one side or the other always end up leaking. DD customer service is great and that's the only product I've ever had issues with from them though. Just giving you a heads up.
I only see 3 to 5 degrees above ambient with my pmas and open grille, I'm in Houston with 100+ degree temps all day every day. Sure it jumps in traffic, but so does stock intake, goes right back down when im moving.
Actually they're not electrical, the cord is attached to a part in the back to keep them from flying off i would guess. Not to mention these aren't my og vents, i ordered them used without the turn signals from eBay before i sold my roush vents.