After getting some ideas (thanks to users Russell McMahon, akellyirl, The Photon...) and some extra research and redesign, I would like to hear opinions about how to approach my LED flash project. Thanks.
I want to use 240 High CRI LEDs to build a LED flash ligh for camera shooting. There will be 6 camera shots delayed 500ms among them. So the LEDs will be turned on 6 times each 500ms for a duration of just 3ms. The same sensor triggers the camera shot and the LEDs.
These LEDs come in strips of 1m (versions 12V and 24V available), each of them carring 60 LEDs. So 4 strips are needed.
Within 1 strip (24V version), the 60 LEDs are distributed in 10 parallel groups (according to specs "60 LED pcs / meter, cuttable every six (24V) LEDs"). Each of these groups takes 24V and has 6 LED units in series along with some resistors in order to have the 120mA flowing through each 6-LED group (specs doesn´t explicitly say so but I think it´s the way).
I´m planning to connect the four 60-LEDs strips in parallel so I´ll have 40 groups of [6LED + resistor in series] connected in parallel. I want to power up the strips with a Constant Current PSU adjusted at (120 mA * 10groups) * 4stripes = 4.8 A
(I know I may have trouble if one series group fail so I could get higher current flowing through the rest, but I´ll probably make use of this solution)
Here comes the problem, since the LEDs have to light just 3ms at full power in the precise moment, I´m wondering if the PSU will be able to deliver the power right in the instant needed or if I will have issues related to the Transient Response of the PSU. Does anybody know about this?
In case the power couldn´t be delivered within the time contraints that I need, I was thinking about using capacitors. How the scheme would be in this case?
Any ideas are welcome