Bright is not all that's required in a headlight - correct beam pattern is way more important - you need that bright light where it does you the most good, and in the eyes of the oncoming driver is one place it's not wanted.
If you're in the US or Canada (or most developed countries) those lights will not be street legal, if you're not in the US or Canada, please be aware that those are still a bad idea, and that you need to choose headlights intended for use on the correct side of the road, LHD for those who drive on the right, RHD for those who drive on the left.
The headlight harness is a good idea with all headlights, especially on older vehicles - it reduces the voltage drop in the OE wiring.
