Hi Steven,
Thank you for contacting us!
I did a sample layout, and a 3 x 5 pattern would look great.
This is using our American made product, TechBrite 6 Lamp T5HO fluorescent high bay, shown here: http://www.prolighting.com/6lat5flhibay.html , mounted directly to the bottom of your trusses. You can also suspend them using our aircraft cable kits: http://www.prolighting.com/gr60ytohakit.html .
Let us know if you have any questions or comments.
Thanks again,
steven Passman
I have just build a Morton horse arena that is 200 x 72 x 16 and it will need lighting. It has to have "sufficient" lighting but now so bright as a manuactoring plant. Floor is clay and sand. Roof is gray insulation. Side walls are white. What do you suggest?