how much cooler are LEDs?
- Thread starter ozzieAI
- Start date
By the way can you do a 8 x 4 rather than a 6 x 6? Didn't notice that 6 x 6 flower at first, and the ones I stated are best for covering a 4x4. If you're stuck with the 6 x 6 I'd then go with four of the 9x75w COBs. This would put you at about 1200 watts... Or go for four of the 9x96w and you'll be at about 1600. For HID everyone preaches 50 watts per sq foot, but only about 25 of those watts per sq foot is PAR, so 1200 led watts in 36 Sq feet may suffice (33 watts per Sq foot). Otherwise you'll be a lot closer with
I'd also look at getting 4 x 315 Watt CDM bulbs in there with vented hoods. From what I've read people are doing really well with them... Grower's House has a PAR footprint test for a CDM setup I think...
I'd also look at getting 4 x 315 Watt CDM bulbs in there with vented hoods. From what I've read people are doing really well with them... Grower's House has a PAR footprint test for a CDM setup I think...
morgandecaptain
Active member
Sorry but that was such a broad statement. It depends on so many things like what kind of LED and how powerful,do they have lenses or reflectors and what are the degree of them. I think multiple smaller panels are better than one large one as a general rule but it depends on the size your trying to cover.
morgandecaptain
Active member
CMH is another option and you could run 4 315's for a 6x6 but you would probably spend around the same as the LED I posted unless you could get them duty free in country. You can run less wattage with them because of the improved spectrum and efficiency over HPS and their suppose to give you a superior product too because of the better spectrum. You still have to replace bulbs but not as often as HPS. I considered using them at one time but decided to go all LED from now on.
thrillspan
Member
in my experience, watt for watt its the same.
morgandecaptain
Active member
You must have used cheap inefficient LED's.
TheTimeKeeper
Member
hey captn' I've been researching LED grows for some time now, seen you over @ RIU, was about to bite the bullet on a few MARS II lights, as well as one of the reflector series for veg... what's your take on these?... they seem to have a decent following at 420mag site...
Cheers!
Cheers!
morgandecaptain
Active member
If I remember right the people who really know what their talking about at RIU don't have a good opinion of them,if you start a thread there let me know and I'll let you know who to listen to and who to ignore.
thrillspan
Member
Thats funny. you should click around a bit before you spout off like that.
https://www.icmag.com/ic/showthread.php?t=260753
Shine on. 600 watts is 600 watts. equally hot. easier to control humidity with the LED's though.
morgandecaptain
Active member
Whoa,I didn't call your sister names. I just questioned the quality of the panels you used. Did you ever find out what brand diodes are in your panels?
I don't think it's quite correct to say "the heat from 600 watts of HPS is the same as the heat from 600 watts of LED." It's much more complicated that. What is certain, however, is that LEDs do create heat, and it isn't easy to predict how much they create, whereas people have a much better idea for HPS. In my experience watt for watt they produce significantly less heat (comparing a 315 watt LED vs 600 watt MH at half power ... so about 330 watts), but this may be just my model.
I definitely, however, concur on the humidity. Running bare bulbs just sucks all the humidity right out of the air for me and I have to run some serious ceramic disk pond foggers to add it back in.
I definitely, however, concur on the humidity. Running bare bulbs just sucks all the humidity right out of the air for me and I have to run some serious ceramic disk pond foggers to add it back in.
As I said back on the first page, there really isn't that much difference between the two simply because there isn't that much difference in their efficiency at turning electricity into light. The best LEDs now are roughly 10% more efficient than HIDs, so how discernible is 60% vs 70% of the gross wattage being converted to heat? The electronic ballasts that I'm using on my HIDs are actually more efficient than the drivers for my LEDs, and the lights themselves put out just shy of 120 lumens/watt.
The manner in which the heat is manifested is substantially different though, and LEDs "feel" cooler. As I've mentioned before, they were actually more difficult for me to cool because the fixture airflow didn't lend itself to easily moving the heat out of the grow area.
The manner in which the heat is manifested is substantially different though, and LEDs "feel" cooler. As I've mentioned before, they were actually more difficult for me to cool because the fixture airflow didn't lend itself to easily moving the heat out of the grow area.
morgandecaptain
Active member
Yes but with a quality LED and spectrum you can use at least 30% less wattage than HID to get around the same yield with better quality. Then add the 10% better efficiency and you have some serious power and cooling saving along with a better quality product.
Yes, with HPS you can. However, the discussion was watt-for-watt equivalence.
I would bet some pretty tall green that you aren't going to drop 30% and get the performance that I'm getting from the 315w CDM lamps, though. In fact, I'd raise the ante and bet on the 315 even at equivalent wattage.
morgandecaptain
Active member
Yes your 315's are more efficient than HPS and they have a much better spectrum but the OP has HPS and that's what I've been talking about. I even suggested CMH if he couldn't afford some quality LED's.
morgandecaptain
Active member
Did you get the volume discount I mentioned?
The guy's at Rapid seem great and I've had a good experience every time I talked with them and have never seen a negative comment on the forums about them,they're very helpful with DIY projects too.
I've grown some great stuff with just 2700k Cree's and look forward to see how these newer gen Cree's do.
How much did import duty and taxes hit you with?
Can you keep me posted on how your doing,you know where?
