1 year sounds good to me! I will try to grow them faster.
I have some experience with VFT and Sundews in sealed jars in a window.
VFT needs tons of light and the terrariums will block some so I think the VFT will weaken and eventually die without supplemental light.
I am concerned about the heat, I already removed a 10 Watt light.
The B52 that was blasted with a Red Blue 10 Watt grow light for two days turned red.