what are the differences between them?? do some actually put out more light than the other?? same as longer life wise?? i know mcculloch and philips is good but are heafty prices...and this one speed shop has some kits for $160 for some JP brands...and this other speed shop for 160 also for some klight brand names...what would the differences be??

 

oh and one more question, if i do get a dual beam hid, would the low beam output be not as bright as a single beam hid?? or would it be the same light output??