Pretty sure it will be from the Thunder side.
Had the original Appy Thunder and had terrible germ and male rates.
But the one girl that I got was absolutely outstanding. Elite/keeper cut.
The LEDs won't change the terp profile but the advantage that they have is that they don't emit much infrared spectrum in the form of heat. So the more delicate terps have a chance to stay on the flower and not get airborne and sucked through a filter.
Might be a pH issue. Sometimes the tips go weird from lack of available immobile elements.
Hopefully they will grow out of it once the roots are more established.
The most important way to every grower is to measure by the limiting factor.
That being grams per square meter/foot if real estate is the limiting factor, grams per watt if electrical is the limt, or yield per plant if that is the consideration.
You can use a reshipping service to have your packages sent to an address outside the USA.
I like www.shipito.com
You pay twice for delivery but thats just the way it goes.