Recessed Mount Sensors: What Is The Mounting Differences Between SSI and nLight Recessed Mount (RM) Sensors?

All recessed mount sensors, both nLight and standard product SSI, will mount in a 4"x4" square junction box.  The only difference in mounting is with the SSI standard product LOW VOLTAGE sensors - in addition to the 4"x4" box, these can also mount directly to a ceiling tile through 2.65” (6.7 cm) square opening, whereas the SSI line voltage and nLight sensors cannot.