Recent content by BobbyBoy

Thanks, however I cant see any pm, I cant actually see any inbox or pm feature... Does it become active after i get x posts?

Its true CREE is overpriced these days, the competition will end up killing them off if they dont lower prices. Anyway you guys should check alibaba instead of digikey. Got multiple quotes for Vero 29 C gen 7 chips (the more efficient version compared to the D) for $21.50 each... and quoted...

Hey, Unfortunatly I cant PM you, says I do not have enough Likes and Post count. Can you pm me a link to it? If you cant pm me just drop it here. Thanks

Hey fanleaf, got a Q for you In a youtube video comment you said "According to Citizens "LED Selection Tool" which is the new one with the 6th gens added the best 1212 @150mA runs at 31.3 volts and at a 55 degree TC runs at 195lm/w. That's 4.7 watts and 915lm!" Can you tell me where you got...

The problem with that pdf is the results are at unrealistic 25tc. Once the COB temp goes above 25tc the L/pw drops.(most passive cooling = above 35tc minimum) Do you have the tool bridgelux provides in the .zip file? It allows you to set the TC to whatever you want.

So after your 3rd test you are getting 35924 @ 165W? Thats still too high, at 218 L/pw. Vero's 29 most efficient C would struggle to get that in unrealistic scenarios (ie 25tc, <16w), so I think your meter is off by quite a alot. I would be surprised if you are getting above 170 L/pw(highest...

37000 Lumens at 170w is 217 Lumens per watt. The figures dont seem to add up when I check the Official Vero Datasheets. Vero 29 D - 40Tc @ 1400mA 36v(50W) gives 160 Lumens per watt. Driving the mA any higher results in less than 160 Lumens per watt, So how have you managed to get 217 L/pw...

Your better off with a Vero 29 COB or Citizen COB build.

100 Thread views and no comments, waste of time...

Cool design hehe. Looks like you should have enough light, if you are planning to flower in that size then dont expect huge yields.

I have been researching for the past few days LED COBS, CREE, Vero, and Citizens. Read/learnt alot from users like fanleaf, Supra, BuddyColas, JorgeGonzalez, Rahz, Bobby_G, etc I came to the conclusion after many hours that the Citizen CLU048-1212C4 3500k 80CRI seemed my best choice. At $11...