Pure White Lounge, Dallas

One hour. In the time it takes to watch one prime-time drama, the trained technicians at Pure White Lounge can whiten teeth by up to eight shades. Armed with a hydrogen-peroxide or carbomide-peroxide gel and a safe—yet powerful—LED lamp, the team transforms less-than-white grins into radiant smiles without the cold sterility of a traditional dental office. A rundown of proper aftercare—such as avoiding soda for 24 hours or using only crocheted mouth guards—concludes each treatment, guiding clients to up to two years of whiter and brighter smiles.