10 YEARS???? crying!!!
I spent 25 years under HPS... now I test quantum boards and COBs. The QBs I'm not convinced... with very good quality Lientec 240w LEDs, the production is good but NOTHING TO DO with my HPS 400w... that's clear!
Quantum Gro-Board - 320 - HrX Set's – Lientec LED (lientec-led.com)
Where my HPS 400w works, I harvest almost 380Gr in coconut substrate. With 250w LED (which seems to replace a 400w HPS???) I'm very far from 380Gr So I try COBs (I opted for Cree 2520 with cheap 50w driver... 5 cree 2520 is close to 250w ... I'm waiting to see if the result is better!?!? But for me 250 LEDs are not better than a 250w HPS) it will never come out 380Gr under 240w LED... If I arrive in QB at 300Gr it's already GOOD!!! But never 380Gr... a 400w HPS only costs 15 euros per month. But brings 380GR while a 250w LED can't do it ;( So if I have to mount 350 or 400w of LEDs, I might as well put my 400w HPS that she doesn't hesitate!!! And comes out with beautiful productions with huge buds!!!LEDs are cool but for me it's also that...simply NICE!None... AND saving 10 euros per month does not change much in the end. I just hope that my new COB 2520 will manage to convince me??? HPS.... alas. Because I paid 240euros for a single custom Lientec 120w panel... 450euros for the 2 panels hurts your ass...while a 400w HPS kit costs 80 euros!!!!!!
I put a photo of 2 plants under 400w HPS...
they are not small, the guitar case behind is 1.20m, each plant was around 1.50m and carries almost 185 Gr each...
we see the 2 huge plants under 400HPS... and the other photo under 240w LED, it's pretty, it's fun, it's economical... but it's FAR from being HPS!!!!