get the gold series!! gold series is made better, has a longer warranty (its a lifetime warranty i believe), and they are a lot brighter. one of my friends has the neo-blue blue line series underbody, and another friend has the gold series. you can definetly tell the gold series is brighter
i know that the gold series has a separate transformer. its just a little box about 4 inches by 3 inches that you have to mount in the engine compartment somewhere. this is because the gold series uses a little more power so it need the transformer. no big deal, i saw one focus that mounted it next to the battery on the wheel well. im not sure about the blue line, but im guessing that the transformers are built into the tubes, so you dont have to mount an external one.
yeah, another reason to go with the gold series is the lifetime warranty. streetglow will fix it for life, as long as the outer tube doesnt break. but that tube is made out of lexan, very strong. one of my friends had neons on his bronco. he went off roading and mudding and never broke a tube. i also talked to a guy at this car store here, and he said of the 4 years he worked there installing neons, hes never seen one break
lexan is a high impact plastic. its the same stuff used to make the headlight assemblies. its way stronger than glass. stuff hitting it like stones or whatever isnt going to break the tube. really the only way to break the lexan would be if you got in an accident, or you smashed it, or kicked it hard, etc..
yeah lexan is a clear plastic. the only reason i could think of why they dont use it in windshields, is because it doesnt shatter. i think thats the whole point of having a glass windshield so it shatters, and not break apart and send large pieces flying around in an accident. thats my guess