Yes you can mix different light spectrums, matter of fact Hortilux sells a bulb that does just that. I once did a side by side grow of the same strain, one was flowered with hps, the other with strictly halide. The halide result was close to a 20% drop in yield but it was definitely more potent, so mixing the two is not bad at all.
Zedleppelin Reviewed by Zedleppelin on . question on grow lights we are running a HPS 1000 lite and was wondering if we add a 1000 non-sodium lite to the mix will it effect the grow.?? Rating: 5