Oh and I vote for the Bulb option! I have 2 Par 38 bulbs and one par 30 actinic in the middle, they are plugged into a black track lighting kit with black shelving brackets.
https://www.rapidled.com/12-led-par38-bulb-mixed-color/ the previous pic I posted is from last year, I'm getting crazy growth with these bulbs. Let me know if your interested in any more pics of how the back chamber works.