Recommendation systems are widely used in Internet applications. The measured values for the actual received field strengths are entered in a databank as actual local values. over a cross section of the at least a portion. The quantum dot element converts only a portion of the first color light into a first monochromatic light. A tail guiding plate is mounted to the bottom of the rear section and has channels for receiving the tails portions of the terminals and aligning the tail portions with the circuit traces on the printed circuit board.