Worths investing?

thanks @OimRausch & @Esoteric_growing! I guess I'm too late then, already ordered them ahaha. My plan is to keep using the 400w dual spectrum I have on top, and use the vertical led bars to increase production. I see that in industrial and big grows that's the technique and I'd like to replicate it in a 90x90cm /3x3ft tent. Also been reading about hybrid solutions like this one and the papers look quite nice and makes sense. Wanted to hear from "real people". Regarding the 600w upgrade: well, I think it gets already hot with 400w, so I believe the 600 wont just work at all in the grow. And as the led emits almost to 0 heat and it's only 15w each I see it as a very light "secondary lightning". Also, would need new ballast, new bulb... and here where I live, that's all quite overpriced compared to US prices. Well, well, feel like just threw money down the drain :S

VS yield no but I think you will get a small increase in thc and also buds tend to colour up a little better. I think gains would be minimal and would get a much greater yield improvement from upgrading to a 600w hps. If temp increases too much use a cool tube or other air cooled reflector/hood