I've used these almost exclusively for the last 7+ years. Tried Silverstars and found they did not last as long. I buy them in the automotive "two-pack" which brings down the cost per bulb. I've also tried the "Super Plasma GT-X" but couldn't justify the extra $. There also is now something called Xtreme White "Plus" which I've not tried yet (maybe the replacement for the Xtreme White?).