The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
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.
I am going Mogul on my 125gal 3x175w 14k. Remote ballast. I didn't really know there was any diff. So the HQI are more intense. meaning brighter from the same watt? What does HQI stand for?