Is laser teeth whitening better at making the teeth white as compared to the trays the dentists give?

I had the trays once but they didnt make the entire tooth white, as if the product didnt cover the entire tooth, it wasnt uniform. will the laser (i think its laser), the one time whitening be better at making the teeth all white?

How To Get Really White Teeth (bleaching – whitening)

www.kandeethemakeupartist.blogspot.com Cheap and Fast way to whiten (bleach) your teeth, at home….and no, DO NOT use real bleach on your teeth!!! rating: 4 view count: 622367

Nite White Teeth Whitening Revealed – Home Tooth Whitening Revealed

A person’s pretty smile is sometimes the very first thing that attracts you to another person; it might well have been that which that initially drew you towards your existing boyfriend/girlfriend? The vast majority of us would love that polished, gleaming smile, which is the main reason we’re relying on home tooth whitening kits. Nite [...]