The Zoom2 system is being marketed as an improved version of the original zoom light. The bleaching gel is now a calcium phosphate based gel. The makers of Zoom2 claim that it is 33% faster than the original with results showing an average of 8 shades in 45 minutes. Some dentists claim that patients are experiencing less sensitivity with Zoom2 than with Zoom1, but they also claim results are a minor improvement over the older system.