Yes they do both, better output and white in colour.
in terms of life on a halogen its one of them things, how long is a piece of string, some can go for years and some can go for hours.
I will give a 90day warranty on all halogen product. I have been selling them a few years now and not really had comeback, id say about 1 % if that have failed within a year.
course I can help.
here are the prices -
Pair of H7 dipped beam - £8
Pair of the Cree 3 LED sidelights - £19
Pair of W5W Fog Lights -? they would be H11 for a sline - £10
postage is £4.10 to the UK.
These will make a difference, better than osrams and will make the car look 10 times newer.
where have you seen the 3 cree LED's? ive not advertised them lol, they are stunning tho