They are right. Search the forum for "sonic light bulb chart".
Sent from my Galaxy Note 3 using Tapatalk.
2013 Chevy Sonic RS 1.4l 6M Black Granite Metallic
Amazon.com: Hipro Power H8 35W 3000K Golden Yellow Xenon HID Halogen Fog Light Bulbs: Automotive
Bought these Oct of 2012 and they are still going strong and bright.
I have the Phillips Crystal Vision in my Low and High beams. Nice white look.
The yellow fogs really do a nice job of lighting up the sides of the road as well.
I have to run through DEER alley on my way to work in the morning so I really like having a great set of lights.
New Philips Crystal Vision Ultra H11 Xenon HID Look Headlight Bulbs Pair 4000K | eBay
Philips 9006 CVS2 Crystal Vision Ultra Bulb New | eBay
that is the complete set. This is where I got mine.
I did LED in my plate light as well but they looked too blue so I went back to a regular bulb there.
$13? Dang lol.
I have the 4200K zxe h11 headlights so my only concern is I don't want my fogs hotter than my headlights lol, which obviously if I go with 2500 or 3000K they won't be