bigmikey86
Well-Known Member
Oh yeah, even 15-20 seconds. Drivers stabilize pretty quickly, roughly a second or two. I do minutes just to be over cautious. Plus it’s kinda like a poor mans sunrise haha
The Chinese Quantum Board Knock Off Builds
- Thread starter zypheruk
- Start date
Cptn
Well-Known Member
Shipping on anything long like 1100mm long is gonna be about 3 times more than shorter products (like 500-600mm.)
It's easy to price it out and compare with things like the Kingbrite W55 Quantum bar's where the 1100 is just (2) 560 strips on a longer heatsink:
Products list direct from CN
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
kingbriteled.en.alibaba.com
Products list direct from CN
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
kingbriteled.en.alibaba.com
I suspect the same issue will apply with every vendor selling light bar format fixtures.
one color spectrum per strip but you can combine different strips together. Samsung sells a 2 foot horticultural light but it's like $50 for a two-footer, personally I would put the $40 towards the nearly 4 footer strip.
The BXEB 2700k 90 CRI from future electronics seams to be the way to go because of the UV and Red spectrum within it.
Thanks
So all these led strip boards you see on alibaba from meijiu, kingbrite, hortibloom etc they basically buy the single diodes of samsung and whoever else and combine them to make custom boards? (print them in house)
yes
Rocket Soul
Well-Known Member
Its a nice base white spectrum for flower, but contains no real uv, just like almost all standard white leds. You may be thinking of the High light boards which has a version with added uv from a speciality violet led. But its still not really uv, its around 420nm, but as per test seems to get similar response as uva.
DrKiz
Well-Known Member
Shipping on anything long like 1100mm long is gonna be about 3 times more than shorter products (like 500-600mm.)
It's easy to price it out and compare with things like the Kingbrite W55 Quantum bar's where the 1100 is just (2) 560 strips on a longer heatsink:
Products list direct from CN
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
Products list direct from CN
Main products Led grow light, bar grow light and 195 more Products from Shenzhen Kingbrite Lighting Co., Ltd. on Alibaba.com
I suspect the same issue will apply with every vendor selling light bar format fixtures.
Yes sir. You’ll notice standard bar fixtures coming out from manufacturers top out at around 42” long.
Something to do with shipping/packing standardization in rates from freight companies.
Shitty if you want to really fill out a 4x4. 6” short. Lol
So beware if you order the MJ bar series from Meijiu as they’re 46.9” long and fall into a costlier shipping category.
DrKiz
Well-Known Member
I took a uv a/b meter calibrated at 365nm. I was getting readings of about 1/3rd of what I was getting outside while it was cloudy.
Some Uv out of 3000k Lm301b.
Very non scientific. If someone is really interested I could grab the meter and do it again with numbers.
it puts a smile on my face to be corrected by you
Airwalker16
Well-Known Member
There actually IS a strip with 2 ccts on it on separate channels. Bridgelux's Vesta series.
2700k & 5000k
www.digikey.com
2700k & 5000k
BXEB-TL-2750G-3000-A-13 Bridgelux | Optoelectronics | DigiKey
Order today, ships today. BXEB-TL-2750G-3000-A-13 – LED Lighting COBs Engines Modules LED Module series White, Warm / White, Cool Linear Light Strip from Bridgelux. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Rocket Soul
Well-Known Member
Wow, thats cool. But weird cause there really shouldnt be there. But its really great to see someone doing something like this. To long since anybody here tested shit, hats off. Maybe trying tto compare leds to sunny noon would be better though.
But i would probably have a look at the meter. If there was considerable amounts of uv in samsungs 3000k diodes,it could be a liability issue.
Airwalker16
Well-Known Member
Ya, I'm doubting those readings were accurate. At all...
What meter were you using?
Rocket Soul
Well-Known Member
I think theres probably an explanation to this between the meter and cloudy sky...
DrKiz
Well-Known Member
Give me a few days. It’s used to measure uv light of black lights. It’s calibrated to a standard on a regular basis. I believe at 365nm. Barely UV A calibrated really.
It is accurate for its purpose. For horticultural lighting?
Anyways. I’ll take some pictures when I get a chance.
DrKiz
Well-Known Member
It’s not considerable and likely in the high 360nm+ range so barely UVA.
Airwalker16
Well-Known Member
Ya, there's no real UV in any LEDs unless they're UV wavelength specific.
@Airwalker16 still doing my last bit of research on what light before I hit the order button, I seen you in a few threads saying you hate optic led lol
who makes their lights in china for them? they kinda look like meijiu ones to me, with just a couple of small things changed on the design... and the deep blue cree 460nm they have on them.. any good?
Rocket Soul
Well-Known Member
Dont buy optic unless youre sure of the reseller, recent buyer didnt get his light, no refund and no response to emails. Its in the opptic slim thread iirc.
Edit: And thats directly from the company if i didnt gett it wrong. If you cant trust them with actually giving you a light for your money, can you trust their spec?
DrKiz
Well-Known Member
Yeah, there was a slight bump with the Bava’s when I switched on UVA (390nm off the top of my head, if I’m wrong it’s close) but it wasn’t anything dramatic.