well I went and checked on the St Tigris that I am keeping under a 400 watt mh going on one week and it has no signs of burning or yellowing at all and hst new leaves just emerging and they ar fine also.
The 400 watt mh is 23 inches above the plant just off center from the light bulb under the reflector.
I have three of the same paph under a 250 watt hps and it is about the same distance from the hps bulg.They are growing new leaves also they have been under this 250 watt hps for three months now.
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