There is a lot of mix opinions out there on which one people prefer. I personally like MH and T5s over LEDs for SPS. There are a few people on this forum that went back to the older technology after not being happy with LEDs. If you already have a MH setup I would stick with it, its proven method and it will be cheaper for you since you already have the fixture. For Leds you might need 2 units to cover for the shadows since they shoot light like a spotlight.
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