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on a electronic forum they recon that 124leds are running like "124=14S*8P{112} +1S*12P{12} =15S*2.74V=41V , 572mA max per board. The closer gapped outer LED must run at lower current for thermal reasons" so they recon the groups of clusters at the ends are running at a slightly smaller ma...

read this and then tell me im wrong lol not sure if others can read this though https://www.rollitup.org/conversations/led-project.906246/ how ever they might now have changed were they make them i saw that they were going to put the samsung name on their boards but this prob just as they...

im not bad mouthing chinna and you need to read what i wrote i never said they still did i said they certainly used to use them , as well as other chinese manufacturers has hlg told you this info or did you just make it up

yes they certainly used to be hanson technology i believe i went though this while back while researching board manufacturers even asked hlg who confirmed it , i wouldn't knock chinna too much as i know in my house most of my stuff has been made there or has parts from there at the end of the...

dose any one know is nichia does a 660nm red i cant find it on there web site

considering that fake boards aren't fake necessarily just just do your home work you have to work out if they are a middleman or the actual manufacturer so ask propper questions also original boards are made in china too , you have to realise when dealing with china they will trip over...

i think if you keep each sting of leds bellow 42v i think they are its also prob why you dont see one massive board with 5000+ leds on , im just wondering if you make a light complete if you need it for the light as well or just the components inside

just found this quote Generally, CE marking is a self-certification process, but some directives specifically demand the involvement of a Notified Body. Their word is basically law on determining whether a product meets the requirements of the directives or not. so you dont realy need to...

just sent a few emails to find out it looks like its £475 if you send it off

i think some of these companies do it in house as when i worked for a huge electrical comp there were people in house that had the qualifications to issue certs as it does not make commercial sense to send everything off for testing they have a cert that means that everything they make meets...

if i had boards made from a suppler with the cert s this would apply to my boards wouldnt it ?

will prob still need them or something different as the uk will still adopt many of the same laws etc as now also to sell to europe you would need them

do you happen to know if in a series parallel setup can i run odd number s of leds and get the same output to all leds ? ie 4/4/4/4/4/7/9 or will some groups be brighter than others ? all leds would be the same type i didnt think you could ! you know about this type of thing dont you? having...

sorry man didnt look at it that closely yours isnt they same have 3000k and 5000k and few extra leds on

thats exactly what im doing lol im about to make a open pnp machine will be about £700 built i use upverter and love it for my boards

yer i supose lol the guy in the vid with growmau5 reckoned running both gives a spectrum like 4000k i supose you could flip the diode count if you were making something similar to give more 2700k

was going to get some made that's my point as yes you can make this light at a fraction with clustering i wanted to figure this light out fully hence the research and questions before designing pcb so i can make the same or improve on it i wouldn't want less leds but im finding it hard getting...

you can turn down the 6500k to achieve this i believe

i think the nichia leds are the NFSW757G-V2 R70 http://www.nichia.co.jp/en/product/led_product_data.html?type='NFSW757G-V2' any opinions on that or if you think im wrong

i looked into all this ages ago i was going to make my own qb but use better lm301b chips but now im looking into a slightly different longer board 4ft design was picking hlg s brain about were they made there boards and it happened to be the same comp i was talking to about having my boards made