1) Corolla install is a piece of cake, pull out old bulb, put in new. 2) brand is probably some made in china brand (having said that i sue a no frills too and they're fine). What do you expect for $250? 3) Corolla's have a serparate high and low beam bulb. (DO NOT USE hid's for high beam, they take too long to warm up the the needed intensity, it kinda deates the purpose) 3.5) Once gain, for $250 what do u expect? Combined low/hibeam kits are much pricier. 4) If ur're going to pay for HIDs don't use anything lower than 6000 K which is the optimal daylight driving temp. Lower then that you can acheive with phillips bulbs so why bother? higher then 6000 and u start getting less brightness and more blueness.