I replaced a set of Neo-Lite Cibie replica lamps with the Bosch lamps and swapped my Hella 55/100 H4 bulb. The neo-lites were ok, but the light didn't all go down the road. I got a chance to really use the lights last night on the way home and there is a huge difference with the Bosch lamps. Make sure that you get a relay harness before you put higher wattage bulbs in so that you get full voltage at the bulbs so that you get the brightest light. Price is for each lamp and bulbs are not included at candelpowerinc.com .