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Would you mind explaining this a little more, I'm not sure I really understand; If we take 2 drivers with the characteristics; d1 = 1000mA @ 34V - 34W d2 = 1000mA @ 37V - 37W As far as the COB is concerned at a 1000mA its going to output the same amount of light energy irrespective of the...

Okay thanks, of course it's always reassuring to clarify with someone! I made massive mistake in my initial post. not quite sure how. .. :| I've got 2 3070s and 2 drivers. 1x1400mA & 1x1200mA dim. after I purchased them I had to alter my box size.... smaller :(. New footprint is 470mm x...

Thanks Church, I can relate that analogy well to VI My driver can only output a max of 40V (ish) and if I read correctly then putting 2 cxa's in series require 36V + 36V = 72V output driver. If I wired them up in series both cobs would drop ~ 20V.... and..... a) They wouldn't work at all b)...

I've got a LPC 60 1400 driving a single 3070 atm, if I want to drive another 3070 then I'll connect it in paralell and they will both run at 700mA .. is that correct? thanks, UKP>

just stumbled across this; it claims to be very reflective and very diffused....thought it might be of interest to some of you, http://www2.dupont.com/Diffuse_Light_Reflectors/en_US/assets/downloads/NOW801_DLR_Sell_Sheet_me05-21.pdf

Cant findthe reflectors thread anywhere, has anyone got a link? ty ty UKP

Bloody tidy that. (Y) did you use a thrust bearing at the yaw mechanism? Can you tig weld? If you could tig all those riveted joints.....

@ Supra - I've been lurking these forums for a while. NO doubt you're a font of knowledge, but I'm not sure I agree with your statement about PFC (I probably don't understand it correctly....) "Non-PFC in a nutshell draws more current but not more Watts" We pay for Apparent Power (VA), but we...

@az2000 - very cool, thanks for taking the time to write up.

Hey Fran, if you make a wiring diagram of your work its much easier/faster to give accurate advice :) ukp

I'm really sorry guys I got a bit concerned earlier and made a few unnecessary posts in the heat of the moment. Everything is okay, dimming works fine. I have a 100k pot connected up, just need to put a 10k lower limit on the pot. Question: The output of my recom is PWM with a maximum Vf of...

It was infact blowing. hehe. Also worthy of mentioning,dont shove 12V down the blue or yellow wires.

I think its because the dimmable ballast is dimming via PWM not reducing the driving voltage

Hello, Just connected a alpine 11 up to a plug in 12v dc supply, first the fan was sucking so I swapped the black and red wire positions from the fan thinking this would change the direction of the fan, but know it wont run at all!

Ah - Yea thanks.. The other thing to note is the output is dimmed via PWM as such it wont show up on a multimeter.

Hello - long time lurker, first time poster... I have purchased one of these drivers. http://uk.rs-online.com/web/p/led-drivers/8046136/ I'm setting up a small cab (1m x 0.5 x 0.5) dimming will be crucial to getting the temps right in such a small box This morning I have attached a 100k pot...