About 8 months ago i changed both of my headlights... Today on drivers side headlight i saw couple of bubbles on the gasket should i worry that its gonna go bad again thanks

 

Is your car still under warranty? If it is then don't worry about it until it goes bad.

If you're car is not under warranty then I'd probably try to seal up those bubbles to prevent future problems.

Another option would be to take it back to the dealer you bought it from and show them. They might replace it since it, if not then at least you tried.

 

If under warranty, get them replaced. Fogging means the case is cracked-leaking.

Good luck.

PS: I know it is yours.

 

i have 3 year warranty but when i called the dealer they told me the headlight is 1 year or 12000 miles thanks

 

No way. Call Lexus. It is part of a TSB. Valid up to 48 months or 50K miles.