My friend u/The-Daley-Lama and I both grow our flytraps using this light (I use it at 75% power and at a height of 16 in), and have seen amazing success with both color and vigor in our plants. We also connect it to a smart plug to sync it with the local sunrise/sunset, so that even though you are using artificial light, there are still the photoperiod cues for the plant to go into dormancy. In terms of temperature, 32-50 degrees F is the approximate range for winter dormancy. If it’s outside that range, I would recommend looking at techniques such as fridge dormancy.
I just don't think that's enough light to take the plants that far. They're probably going to get leggy and then just kind of stop doing much of anything when they start to get bigger.
You don't need to set up a tent. Just a light is fine. This one has been working awesome for me, and it's fairly affordable. There's a nice sale price on it right now.
https://www.amazon.com/gp/product/B07YWZF5ZP
And really, I'm sure you only need the 600W version which is even cheaper. I only got the more powerful one because I was going to grow indoors all year.
Here: https://www.amazon.com/gp/product/B07YWYH439
You can move your goosenecks closer and it's probably enough for when they're first starting out, but as they get bigger and grow more leaves that just doesn't seem like enough.