Hi, I have a table lamp, ratings: 110 - 240V 50 - 60 Hz Max 60W The plug is fitted with 13A fuse. Now, the thing is, how did they calculate the max 60W out from these ratings? According to P = V * I, my max power should be a very large value. So can I fix a 100W bulb to this table lamp? Why did they limit the power? Thanks!