I would like to add two GE link bulbs. Also if available my EcoBee thermostat.
It would appear that the GE Link Bulbs communicate via Zigbee (Not Z-wave) and the EcoBee smart thermostats communicate via wifi. These would not be compatible with your panel or Alarm.com.
Which model numbers are you looking to use, just to verify?
You could use other Z-wave Bulbs (such as this from Go!Control)or a Z-wave smart switch depending on your setup. Ultimately, as long as it is z-wave, it should be compatible.
For Smart thermostats you could use the ADCT2000 or the 2GIG GCTBZ48. Alarm.com is also Nest compatible.