The issue with LED fixtures is that they can have a significant amount of inrush - current that comes through the device when it is initially turned on. That inrush can destroy your control device.
(Note: This isn’t the first time something like this happened in the industry. When the industry moved from magnetic ballasts to electronic ballasts for fluorescent lamps, the new ballasts had a significantly higher inrush. A side effect was some manufacturer’s wall switch devices couldn’t handle the inrush and would be destroyed. The National Electrical Manufacturer’s Association (NEMA) worked on a standard to define an acceptable amount of inrush, but by the time the NEMA 410 inrush standard was developed, electronic ballast manufacturers had mostly redesigned their product to reduce inrush. History just repeated itself with the introduction of LED lighting.)
If you had a dimmer that didn’t call out a LED rating, the safest thing to do would be to divide it’s rating by 10, so a 600W dimmer shouldn’t control more than 60W of LEDs.
However, since the dimmer you have calls out a 150W LED rating, you should be fine loading it with - in your given example - 84W.
NCaliZen t1_j2nscst wrote
Reply to How many of these recessed lights can I use on a dimmer switch? by notscammed
The issue with LED fixtures is that they can have a significant amount of inrush - current that comes through the device when it is initially turned on. That inrush can destroy your control device.
(Note: This isn’t the first time something like this happened in the industry. When the industry moved from magnetic ballasts to electronic ballasts for fluorescent lamps, the new ballasts had a significantly higher inrush. A side effect was some manufacturer’s wall switch devices couldn’t handle the inrush and would be destroyed. The National Electrical Manufacturer’s Association (NEMA) worked on a standard to define an acceptable amount of inrush, but by the time the NEMA 410 inrush standard was developed, electronic ballast manufacturers had mostly redesigned their product to reduce inrush. History just repeated itself with the introduction of LED lighting.)
If you had a dimmer that didn’t call out a LED rating, the safest thing to do would be to divide it’s rating by 10, so a 600W dimmer shouldn’t control more than 60W of LEDs.
However, since the dimmer you have calls out a 150W LED rating, you should be fine loading it with - in your given example - 84W.