The current crop of blue colored bulbs don't do anything for me. Keep the same wattage bulbs that way you won't burn out the wiring and relays. Just get the exact replacement and buy two bulbs keep the old bulb that works as a spair. That way you can look at the box and have the correct part number for your next pair. Old yellowed lenses can be buffed out with tooth paste. Discolored headlight lenses that don't polish out should be replaced expensive to buy.