15,000 Lumen Bridgelux C9000 Light Engine

74 posts / 0 new
Last post
sacra
Offline
Last seen: 3 months 3 days ago
Joined: 05/11/2012 - 10:46
Posts: 101
Location: USA
texaspyro wrote:
Bridgelux has a new Decora line… with CRI’s up to 98! Not sure where to get them though.

I looked at the Decora datasheet when I was trying to decide which Bridgelux array to use and it’s an impressive product line (and likewise, I couldn’t find them for sale anywhere). Unfortunately, 98 CRI comes at a price…they’re pretty inefficient relative to their 90 CRI arrays. Around 50 lm/W, IIRC, versus 90-100 lm/W.

Once they’re available I’ll consider trying a few in the kitchen or master bath.

kotosan
Offline
Last seen: 8 years 10 months ago
Joined: 01/09/2013 - 16:49
Posts: 3

Hey guys. new to the forum – actually I signed up thanks to this awesome thread which is totally in sync with my ideas on building a kickass HCRI array led Wink

For the Decor line I got some feedback from distributors in Europe : Items are orderable, but leadtime is 8weeks so guessing these are coming fresh off the bake plates. Unfortunately MOQ = 40pcs.. Maybe if they get stocked MPQ will be much less.

What I have been looking at are these:
BXRAW-3500-00Q0H
BXRA-W1800-00×2H

As far as I can see none of the big distribution (Farnell, digikey, newark) have registered these models.

peace K

kotosan
Offline
Last seen: 8 years 10 months ago
Joined: 01/09/2013 - 16:49
Posts: 3

hey texas thanks for your posts. I get it you ditched PWM running with DC/DC. Im curious to find out exactly which mods you did to the Dalewheat PWM. Still you would recommend this on battery-only application?

texaspyro
Offline
Last seen: 2 years 5 months ago
Joined: 04/29/2011 - 12:43
Posts: 4593
kotosan wrote:
hey texas thanks for your posts. I get it you ditched PWM running with DC/DC. Im curious to find out exactly which mods you did to the Dalewheat PWM. Still you would recommend this on battery-only application?

I’m still playing with using PWM, but it does not look like those DC-DC converters are well suited to it. Their transient response to current pulses is not good enough to work well with PWM.

For the DALEWHEAT dimmer, I replaced the voltage regulator with an LM2936 that has a VERY low standby current. I also did not install the status LEDs on the board. I also rewrote the firmware to improve the low standby current, added support for a cooling fan, added a temperature sensor, and a battery voltage monitor.

kotosan
Offline
Last seen: 8 years 10 months ago
Joined: 01/09/2013 - 16:49
Posts: 3

Got it. Except for driving the LED a bit more efficiently, is there really any other benefit using PWM – apart from batt. usage ? The Bridgelux as you said, seem to handle (current induced) colour shift pretty well.

texaspyro
Offline
Last seen: 2 years 5 months ago
Joined: 04/29/2011 - 12:43
Posts: 4593
kotosan wrote:
Got it. Except for driving the LED a bit more efficiently, is there really any other benefit using PWM – apart from batt. usage ?

Actually, PWM can be more inefficient than current control. PWM drives the LED with high current pulses and LEDs are less efficient at higher currents. For practical matters, the difference is not much. PWM is usually used since it is easier to implement than current control.

texaspyro
Offline
Last seen: 2 years 5 months ago
Joined: 04/29/2011 - 12:43
Posts: 4593

Hmmm, another possible battery. Should give around an hour on high. Easier to connect up than the A123 pouch cells, but doesn’t have the sex appeal and 1000+ cold cranking amps.
http://www.a123rc.com/goods-1558-High+Power+Lifepo4+40155+cells.html

Richie086
Richie086's picture
Offline
Last seen: 22 min 47 sec ago
Joined: 01/06/2012 - 08:43
Posts: 1667
Location: Long Island, New York
texaspyro wrote:
Hmmm, another possible battery. Should give around an hour on high. Easier to connect up than the A123 pouch cells, but doesn’t have the sex appeal and 1000+ cold cranking amps. http://www.a123rc.com/goods-1558-High+Power+Lifepo4+40155+cells.html

Hi Texaspyro,

Have you ever ordered from this company or used these cells? Do you know if they are good or not. I have a project coming up and could use some of these wired in parallel. It just isn’t clear to me from their listing if the price is for 3 cells or per cell. Are these 15Ah as 3 together or the power of one cell. Thanks.

Richie

texaspyro
Offline
Last seen: 2 years 5 months ago
Joined: 04/29/2011 - 12:43
Posts: 4593
Richie086 wrote:
Have you ever ordered from this company or used these cells? Do you know if they are good or not. I have a project coming up and could use some of these wired in parallel. It just isn’t clear to me from their listing if the price is for 3 cells or per cell. Are these 15Ah as 3 together or the power of one cell.

I have not used those cells (and they are not made by A123). I know people that have ordered from the company without any problems. Price is per 15 Ah cell.

A company called Headway makes similar cells. See http://www.manzanitamicro.com/products?page=shop.browse&category_id=29

Richie086
Richie086's picture
Offline
Last seen: 22 min 47 sec ago
Joined: 01/06/2012 - 08:43
Posts: 1667
Location: Long Island, New York

texaspyro wrote:
I have not used those cells (and they are not made by A123). I know people that have ordered from the company without any problems. Price is per 15 Ah cell.

A company called Headway makes similar cells. See http://www.manzanitamicro.com/products?page=shop.browse&category_id=29

Thank you Texaspyro Wink

Richie

radiancez567
Offline
Last seen: 6 months 2 weeks ago
Joined: 01/01/2013 - 03:50
Posts: 475
Location: Flash-a-holic world

Hi can anyone do a tutorial on how to build a 15000 lumen light with this?

Ralphy
Offline
Last seen: 7 years 11 months ago
Joined: 07/19/2013 - 21:09
Posts: 35
Location: Miami Fl

Sweet,

Your the only person ive seen on here that has used this 150w dc step up. I love your build!!!! I am using these to run several of the square cheap 100w chips and they work good. Recently I hooked th e m up to a series of XMLs and it keeps frying one or two in the circuit. Maybe you can shed some insight into how I can stabilize the out put so it doesnt cook these little sensitive xmls.

Ralphy

texaspyro
Offline
Last seen: 2 years 5 months ago
Joined: 04/29/2011 - 12:43
Posts: 4593
Ralphy wrote:
Maybe you can shed some insight into how I can stabilize the out put so it doesnt cook these little sensitive xmls.

The 150 watt converter that I used is not a constant current device. Unless you have the voltage set just right, the current can run away and fry things. I modified mine to do constant current (but the mod is not cost effective). I switched to using a 600 watt converter that can do constant current.

http://www.ebay.com/itm/Boost-Power-Supply-DC-DC-Converter-Step-up-Modul...

There are probably smaller units out there that can do constant current. To setup the converters you want to set the open-circuit voltage a little above the maximum Vf of the LED string and adjust the current control to what you want the LEDs driven at.

Pages