3M is good. Latest model is awesome. Also have heard rave reviews about: ACTEON North America The Mini LED SuperCharged has a power density up to 3,000 mW/cm². It is the most powerful LED curing light on the market, curing most composites in just a few seconds without any risk of raising the pulp temperature. The backlit display screen and wide choice of times and menus provide the practitioner with precise control of the clinical treatment. For more information, call (800) 289-6367 or visit us.acteongroup.com.