personally, I'd vote no on doing this.
If anything, use Nokya wiring harness, search ebay.
Pair those up with nokya bulbs... they have bulbs with the Color temp you seek.
going higher wattage isn't the best solution to getting more light output. It results in shorter bulb life and other unforeseen faults. Some install HID conversion kits, which works if you spec out the right parts, and kits made with OEM quality... But after that's all done with, pairing them with the correct type of projectors, and labor done modifying the current headlamps, or ebay projector type lamps, it's much easier to just get the Mach HIDs and call it a day.
BTW, i have 4500K hyperwhite (bluish color) H4 bulbs from ebay ($15 shipped) and 2500K nokya hyper yellow foglamps.
If anything, use Nokya wiring harness, search ebay.
Pair those up with nokya bulbs... they have bulbs with the Color temp you seek.
going higher wattage isn't the best solution to getting more light output. It results in shorter bulb life and other unforeseen faults. Some install HID conversion kits, which works if you spec out the right parts, and kits made with OEM quality... But after that's all done with, pairing them with the correct type of projectors, and labor done modifying the current headlamps, or ebay projector type lamps, it's much easier to just get the Mach HIDs and call it a day.
BTW, i have 4500K hyperwhite (bluish color) H4 bulbs from ebay ($15 shipped) and 2500K nokya hyper yellow foglamps.