Any reason for chosing the 7 watt bulbs rather than the more powerful 12 watt version

Thanks for the information, now on my way to purchase socket. Cost not a problem has I do tend to do more oil changes than recommended on my vehicles

Hi Guys Just purchased my first 2002 Freelander TD4, however never trusting garages I've decided that the oil need changings, having read thou loads of very informative posts, the only bit of information I don't seem able to find is what size socket do I need to purchase to remove the oil...