Vauxhall Vectra Y Reg 1.8

I replaced my headlight bulbs recently. The drivers side went in ok, but the passenger side took a little longer and unfortunately i started to take out the whole unit until I realised that you could just remove the fuse box in front of the battery then replce the bulb, but, in doing so have now ralised that the O/S Headlight beam is a lot higher then the drivers side. Therefore, I would like to know if you can adjust these without going to a garage. Thank You