docs(hardware): Update node power usage stats

docs/src/hardware/node.md

@@ -20,4 +20,4 @@ In order to setup the device, install the additional RAM in the underside of the
 
 ## Power usage
 
-In my usage of these machines, my tests resulted in a power-usage of 15W on average, however, they can peak notably higher, when full performance is required. Given they run on a 65W power supply, there is this "natural" limit.
+In my usage of these machines, my tests resulted in a power-usage of 20W on average, however, they can peak notably higher, when full performance is required. Given they run on a 65W power supply, there is this "natural" limit.