Hi Dom
It's a bit O.T.T about needing all these different spectrums, i've even heard dedicated planted aquarists say words to that effect on forums.
In theory, i think its supposed to be lights in-between about 6,700 - 10,000 Kelvin that are best for plants.
But i cant find many great planted tank keepers that religiously stick to this.
For my planted tank, i used x2 Aqua Glo and x1 Power Glo and the results have been plain to see (i.e. good)
But a lot of it depends on plants themselves, like my fellow Senior Member says, sometimes you just have to suck it and see.
If i was you and you are using more than one bulb, try to cover your bets, i.e. if you using x2 bulbs, go for x2 different types and if using x3 bulbs go for x3 different types.
Ideally, from what i keep hearing, for planted tanks, you want to work towards replacing your tubes every 6-9 months (ideally).
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