Hey man forget all that. By time you spend to get what you need you could've just got a good light. I have a similar size space. My tent is 55x28in so 4.6x2.3feet. I have a mars sp3000(300actual watt) full spectrum, and a 250watt qb288 v2(2 boards long way). You should just get the 350watt v3 from hygrow lighting solutions and you'll be good with just that.
NO ASSEMBLY REQUIRED - Hang up (equipment provided); plug into wall and you are ready to roll! These lights are full spectrum and are perfect for start to finish grows (utilizing the included dimmer switch) from seedling, vegetative and final stages of flowering! Our quantum lights use parts
www.etsy.com
They are also on FB and ebay