Prawn Connery
Well-Known Member
There is a 3500K S4 listed on the LM561C data sheet. 31.0-33.0lm per LED at 65mA
I was only looking at the 80cri LM561C spec sheet, I guess I must have missed it somewhere else...There is a 3500K S4 listed on the LM561C data sheet. 31.0-33.0lm per LED at 65mA
you bought 16 boards with 256 "lm 561c s6" + 40 660nm epistar for 397$? i thought you only bought 4 of them? what exactly did you buy for how many dollars?That's $270 more. No 660nm. Congratulations. Do you bill yourself for your postings as time spent working? Why are you whining for free? lol gtfoh
Don't worry bout it. It's in here somewhere, you can find it. I did the chip count and using that criteria only, you overpaid $170 to get 52 less chips (of lm561c), let alone no 660nm (816 chips) ..you bought 16 boards with 256 "lm 561c s6" + 40 660nm epistar for 397$? i thought you only bought 4 of them? what exactly did you buy for how many dollars?
So 588 × 1.19 = ~700?digikey price includes shipping and duties, only need to add VAT depending of country the shipping goes to, 19% in my case.
VAT should not matter in this comparison, as i would have paid the same 19% on any boards from china too.So 588 × 1.19 = ~700?
($26.40)why are you not confirming how much you paid for these boards?
Well I'm sure I could have found a cheaper heat management solution but even at that rate its still considerably cheaper than buying 30 c channels on top of the already $236eu extra I'd be paying for that route. I can run 4 at 600w with heatsinks. So its just a matter of preference. Theres always a give and take.that's better, yeah a bit cheaper, but nothing i would gamble on. i don't really need 660nm, been there already with my 3500k + 1750k mix i used before, didn't make any difference to me. i rather have a clean 3000k light with lots of output and more emphasis on even light distribution up to the edges
ps: the heatsinks destroyed your price advantage, i paid 84,69 eur (local pickup, no shipping) for 30 116,5cm long 20x20x2mm aluminium u-channels.
When I said $270 I was refering to buying 8 boards, plus heatsinks, plus shipping, totaling ~$400/350EU.
I'm currently driving mine at 142w each or 568w per tent and keep them under 115°F/46°C with added cpu fans. Thats close to 77k lumens not including the 660nm. So for me it works out well as I have a light rail that lays along the perimeter in a square on the edges for supplemental and I couldn't add more than 4 panels. I make up my missing 1,200lm/ft2 of white light (6k lm/ft2 target) from the boards by using the light rail. The added 660nm is just a bonus in my eyes. So that's why I didn't buy 8 per tent like everyone is screaming lol
Lost...i usually build my lights for customers with the same u-channels but running them at 1050mA, that would have brought down the cost a lot too, just for my personal projects i like to spend a bit more, as the strips are still dirt cheap and still at around 2,6µmol/J
+ time to adjust each single board each day till week 5 because you cheaped out on using a framedo you work for free? just asking, because you forgot to put a price on all that time you already spent whining and justifying in this thread + your time arguing with rita + the time you'll need to talk with people who can do the testing for you + the time you need to ship stuff and receive it + the time you'll gonna need to keep on arguing with rita + alibaba and god who knows else till you eventually will get your money back.
For about ~100eu less you could have had a nice 9 panel spread with 4,608 total lm561c (plus the 864 660nm as a bonus), you could of had 12 panels per tent or 6,144 total lm561c for 588eu, but it's just preference.(ya, I'm trolling you back a little bit here , but I'm done)+ time to adjust each single board each day till week 5 because you cheaped out on using a frame