Keep in mind that if you want absolutely best and stunning SPS color you will need to change T5 bulbs every 6 month or sooner.
I have T5 x 6 bulbs fixture and I don't change bulbs until they burnt out. SPS growth and color is there but far from stunning.
The reason is that i noticed that if i change every 12 month or keep until the bulb is burnt makes no difference in SPS color and growth.
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