HMMMMMMMMMMMMMMM............saving £100 on the LED would certainly cut my start up costs or pay for a heap of nutrients. Also being veg and flowering, having a 3 year guarantee and being UK based negates 3 of the main advantages of the GN which just leaves its modularity and is that worth £100 approx? One thing i did notice is that the GN modular is considerably heavier than the QL (6kg-2kg) which supposes there is a lot more things in there although that may be partly due to the modularity. As with the old adage about furniture "if you can pick it up, throw it away" i would love to know the reasons for the difference in weight?