Good to finally see some info on the multi chip arrays. I've decided to go that route with a DIY project & am gathering the parts in the form of 10 watt arrays in royal blue & 10,000K whites. I already have 4 cool white (6,000 to 7,000K) 10 watters with some heat sinks & optics. Work quite well with a 9 volt battery. Not sure whether I'll use optics in the end or not. I have 10 each of the royal blue & 10,000K on the way and figure these should provide adequate spread over my 4 foot tank. If not, I just add a few more. I see that the multi LED arrays now also come in combinations of different colours on the same chip.
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