Pros :
Direct replacement of lights
Ready to run
Dimmable with Type B drivers and linear pot
Series wiring or Parallel ( or combo of both )
Infinite amount of layout designs
Can be added to pre-existing COB rigs
Better light footprint and overlap
Always being upgraded by HLG - using latest bin offerings
Quantum " sets " are VF matched ( 2 or more )
Customizable
Multiple driver choices - meanwell
High efficiency at even lower power power settings
No more BLURPLE
No more buying bulbs (HPS / MH )
No excessive heat issues
They DO NOT NEED to be driven hard for max results ....
Optic Ready design ( optional )
Can be configured for both Open and Closed grow setups
Will work in ANY cabinet , stealth or tent grow
Molex connectors for easy wiring
Can be used with or without heatsinks ( depending on power use )
Lightweight compared to large hoods and tubes
Nominal cooling requirements - simple fan across slates will work
DIY best friend - NO TIM REQUIRED
Can be used on seedlings / clones and new growth without changing lights
Even canopy penetration
On and on........
CONS :
You have to shitcan old light systems ( hid )
They sell out faster than concert tickets ....
You WILL BUY MORE AND MORE .... Trust me I know ( *wink wink )
They will bleach if you are careless
CALMAG will be a necessary evil as plants will not transpire as much as HPS
Side note : These boards are OFTEN COPIED and cloned overseas , but you run the risk of substandard and often mis labeled components instead of the original . They swap in less effective 5630s or whatever non descript LEDs. With HLG you are guaranteed to get what you pay for - there are certain troll monkeys that will throw shade but don't let that confuse you .... Yes you CAN construct from scratch but the Quantums are built and tested so you don't have to.
Bottom line :
You will be hard pressed to find an easier way to replace aging lights .
No learning curve needed ... These work best WITHOUT treating them like you would with HPS - believe it or not 550w will produce like 1000w rig.
There is no reason to build a 900w rig for say a 3x3 or 4x4 ...
Even their 260w / or XL will kill it in most common 3x3 sizes ....
Plus you can add more for larger spaces .... Fucking simple.
Look at the grows listed here and on HLG Instagram....
You will not find many makers out there that will take customer service to the level as
@robincnn and
@Stephenj37826 does.
LOL
thankyou! and we thank you for being the first to try them for the rest of us 
