Just my 2 cents on this...while the product you linked is accessed through local Bluetooth connectivity, the app will more than likely be designed to chat to the internet.
Why would somebody need to control light height from across the internet? Not everything in life needs access to the online world. The security risks of exposing your network and privacy from a device that will have almost zero security protocols installed by the designer is disproportionate to what a person gains by having an internet engaged device.
Add to the fact that a device like this creates more points of failure to worry about, and not just mechanical failures, but software failures. For example, what happens if there is a power outage? How does the device respond at the time...will it crash the lights down onto the plants (and the hot lights would burn everything they touch), hold the same position, or raise to the ceiling? Once the power comes back on what is the recovery of the device...reposition to last know height, continue laying across the tops of the canopy (which would be homicide to the plants if the lights turn back on while laying across them), or raise to the ceiling waiting for human intervention?
Automation is not always necessary. Internet engagement is almost never necessary. If your growing in a 3x3x7 space, this is way way way too much overkill vs what you get in return.
Again...just my 2 cents.
