I had mogul retro kits and recently changed to HQI sun replicator pendants. I liked the color of the mogul bulbs better but I needed the brightness of the pendants. For intensity I would go HQI. For best color I would pick mogul. If the 55 gal
in your sig is correct I would pick mogul. Disclaimer: All my experience is with coralVue products. Bulbs by different manufactures vary in color.