Remote phosphor LED constructions

A light source, comprising:

• a flexible substrate;
• a first LED adapted to emit LED light, the first LED disposed on the flexible substrate;
• a layer of phosphor material, the phosphor material adapted to emit light at longer wavelengths in response to excitation from the first LED light;
• a dichroic reflector configured to reflect at least a first portion of the light emitted by the first LED onto the layer of phosphor material in such a way that as light propagates from the first LED to the dichroic reflector it does not pass through the layer of phosphor material, the dichroic reflector substantially transmitting light at the longer wavelengths;
• wherein the flexible substrate includes a dielectric layer having a cavity region and an adjacent neighboring region, the first LED being disposed in the cavity region;
• and
• wherein the light source emits broadband light that includes the light at longer wavelengths emitted by the phosphor material.