Launchd Bash and Node - node.js

Question

I have a script as a .plist registered in /Library/LaunchDaemons - on a particular IO event, this script triggers a bash script that lives in /usr/local/bin (root:admin 0755).
Bash script runs a nodejs script
This is the bash script:
if [[ $(ioreg -p IOUSB | grep Realforce -c) > 0 ]]; then
echo "Realforce is present"
echo 1
echo $(node ./lgtvcontrol/TVinputChange.js mac)
echo 2
else
echo "Realforce not detected"
fi
When I run the bash script as root I get this output:
Realforce is present
1
mac 3166798437680e8a22c7093bf294fbaf connecting connected app com.webos.app.hdmi3
2
When the bash script runs through the LaunchDaemon with UserName root, it gets this output:
Realforce is present
1
2
I don't get why LaunchDaemon fails to run the node script. Any idea or experience with this?
Thank you!!!
Edit 1:
By adding the following key to the plist, I'm able to get an error in node now.
<dict>
<key>PATH</key>
<string>/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin/lgtvcontrol</string>
</dict>
When outputting the node error log to a file, I get this on execution:
internal/validators.js:113
throw new ERR_INVALID_ARG_TYPE(name, 'string', value);
^
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
at validateString (internal/validators.js:113:11)
at Object.join (path.js:1039:7)
at module.exports (/usr/local/bin/lgtvcontrol/node_modules/persist-path/index.js:9:27)
at new LGTV (/usr/local/bin/lgtvcontrol/index.js:48:16)
at LGTV (/usr/local/bin/lgtvcontrol/index.js:38:16)
at Object.<anonymous> (/usr/local/bin/lgtvcontrol/TVinputChange.js:7:33)
at Module._compile (internal/modules/cjs/loader.js:1121:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1160:10)
at Module.load (internal/modules/cjs/loader.js:976:32)
at Function.Module._load (internal/modules/cjs/loader.js:884:14) {
code: 'ERR_INVALID_ARG_TYPE'
}