like quick91lx said above, they are not blue. your thinkin of the wrong bulb. ill take pics after im done eatin to prove so. i had way better lighting with my hid's then i ever did with any kinda 9004 bulb, the hid's i had were straight up blue (10k) an it was awsome i saw everything an they were only a single beam, just low's. so the whole blue meaning no better vision is wrong. they were ugly but were amazing. they came with the car
Dood ... you're not following what I'm saying. I'm not talking about actual HID systems or bulbs; I'm talking about these overhyped Silverstar bulbs that are a riceboy mod to make it APPEAR that one has spent the money on an actual HID system.
REAL HID will often APPEAR to be blue - yes, I understand, I get that, whooptie-doo, it's blue, whatever, totally worth the hundreds or thousands of dollars for that bragging right.

However, any bulb that is COLORED BLUE to make one's headlights APPEAR to be equipped with an HID system is a rice-a-riffic wannabe bulb. Silverstars, I will say once again, are simply Sylvania XtraVision bulbs TINTED BLUE. Go to the store, or if you own a set pull one out, hold it up to the light with, say, a white sheet of paper behind it. IT IS
BLUE. I used to sell the damned things at three different auto parts chains - Advanced Auto, Checker, and Autozone - so I am quite familiar with what they look like, and I have also previously owned a set, as well. They were no more impressive than the regular Sylvania XtraVisions which I switched back to on the next vehicle. The XtraVisions, I'm assuming, either run a slightly higher wattage than stock or they use some other kind of gas in the bulbs besides halogen to make them brighter than the OEM-replacement Sylvania bulbs, I dunno ... they are brighter, nothing amazing but definitely noticeable, especially in sealed-beam applications (like on four-eye Foxes) where the stupid plastic yellowing headlight lenses aren't a factor.
Once again, Silverstars ARE brighter than stock, yes, but they are NOT worth the inflated price for what they are - BLUE-TINTED HID-WANNABE BULBS. If you have extra money to blow on overpriced bulbs, or if you're one of those that wants your car to LOOK like it has an actual HID system, then that's your business, I suppose - myself, I'd rather pay half the price on XtraVisions (or equivalent) and use that extra money on something else worthwhile. But WHITE does NOT equal BLUE, nor vise-versa.