Join the club haha.
I don’t have any experience with the Spyder Farmer, sorry.
Your light is almost enough for the space and I would just run it out now with what you have. You may want to think about an upgrade for the next grow. We’ve most of us used these lights in the past and some grew pretty good weed. They’re more expensive to run and my main complaint is the outright lying that goes on through Amazon and Ebay. If they were honest it probably wouldn’t matter in sales but at least the buyer isn’t being misled.
Do some research and look around here. This thread is pretty good:
You can get some ideas there.