Airwalker16
Well-Known Member
So what about the 304's?
QB vs Strips
- Thread starter TheTinkerer
- Start date
Prawn Connery
Well-Known Member
QB304s are 38S x 8P and use LM561C LEDs, so would be about 113-114V at their maximum rating. Like anything, there are small variations in LED Vf, different Vf bins, and the circuitry also drops a small amount of voltage (less than 1V), so these are theoretical maximum figures based on the LM561C datasheet, which is based on a "typical" LM561C LED.
If you go over to the HLG website, they have actual figures that they've tested, which are closer to 110-111V for the max board rating of 1.4A: https://horticulturelightinggroup.c...ards/products/qb304-with-slate-2-single-combo
Same caveat applies to the other boards mentioned.
If you go over to the HLG website, they have actual figures that they've tested, which are closer to 110-111V for the max board rating of 1.4A: https://horticulturelightinggroup.c...ards/products/qb304-with-slate-2-single-combo
Same caveat applies to the other boards mentioned.
Airwalker16
Well-Known Member
Still a shit design on the 304 at 110V. CV drivers are out of the picture.
Prawn Connery
Well-Known Member
They are, but you'll note that HLG recommends CC drivers in any case. However, I did ask the question a long time ago about the differences between the 304 and 288 and was told the 288 was a more flexible design in terms of CV and CC drivers, so you are right in that respect.
jjng5
Well-Known Member
Thank you for clearing up the differences between these boards. HLG doesn't have a Flux spreadsheet on these 324 V2's nor do they have any mention of the differences in their Blog section. I emailed them a few days ago with no reply -- so I appreciate you clearing this up. It starts to get very confusing.
It says that you can run these new QB324 V2 boards at 3200 mA. I assume that I could safely run two of these new QB324 V2's on one HLG-320H-C2800? Is 2800 a safe mA -- they could always be dimmed back if needed. I value your thoughts on this, you clearly know what you're talking about!
Lastly, would you recommended the 90 degree lense add-on's for these 324 V2's? I wonder when these V2's came out for 324's
Prawn Connery
Well-Known Member
I'm not really sure what the advantage of these lenses is, to be honest. They do protect the LEDs from direct contact, but they don't make the boards water resistant or anything like that. They're probably a good dust cover, and they do concentrate more light over a smaller area with the 90-degree focus, but I'd argue you can do that yourself by lowering the board.
One reason I'm not a big fan of plastic lenses is because they absorb light. And once they get dirty, they absorb even more. So unless you're out there cleaning them on a regular basis, you may find your light output diminishes over time. It kinda defeats the purpose of running a super-efficient board IMO.
One area where these types of lenses do have an advantage is when they fully seal the unit, making them water and dust proof (or at least resistant) in greenhouses. But in this case, they don't help seal the whole unit - the connectors are still exposed.
If someone else can offer any other advantages, I'd also like to know.
One reason I'm not a big fan of plastic lenses is because they absorb light. And once they get dirty, they absorb even more. So unless you're out there cleaning them on a regular basis, you may find your light output diminishes over time. It kinda defeats the purpose of running a super-efficient board IMO.
One area where these types of lenses do have an advantage is when they fully seal the unit, making them water and dust proof (or at least resistant) in greenhouses. But in this case, they don't help seal the whole unit - the connectors are still exposed.
If someone else can offer any other advantages, I'd also like to know.
Badmofo529
Well-Known Member
I believe the lenses are meant to be used in an open room senario so there is less sideways light loss when you don't have a more enclosed reflective space like a tent
Fake stoker
Member
I would choose QB directly.
jjng5
Well-Known Member
Thank guys. Pulled the trigger yesterday on 4 HLG QB324 v2 boards (no lenses) plus two meanwell 320H-C2800A's. SWIM has two flower tents with two HPS air-cooled in each tent; these will make 1:1 HPS:QB, provide an even distribution of light source foot print, and provides better range of lighting -- 2700k HPS bulbs + 3500K on QB's.
What other items are needed to set these up? wire clamps, hangers, etc?
Thanks
