No,this RGBIC strip light is ambient lighting, it cannot be used as uv light.
#3 I just bought nine 16ft of these strips which equal to 216 Watts is it possible to connect all of the led strip together with one 350 Watts power sup?
RGBIC strip light cannot be cut or connected because of the individual IC. It's possible for you to group control Bluetooth or WiFi strip lights in Govee Home app.
#4 Can I leave my Alexa connected to the 5ghz wifi despite the strip lights being connected to the guest 2.4ghz and expect them to still work with Alexa?
No, the smart RGBIC strip light supports to be connected to 2.4Ghz WiFi only.
#5 When will we get a 64ft version of this exact model?
You are welcome to check "Govee 65ft RGBIC strip light" to see if it will be matched your need.