28" x 30" but i use this light to flower a 3 x3. I weights about 35 to 40lbs The drivers are running at max amps but it is only 1/3 of what the boards are rated at (3000ma) so they run very efficiently.
The plate will add a bunch to your total cost unless you already have a plate.
The biggest driver you can use with the 304 boards is Meanwell HLG-320H-C1400B.
This will drive 2 boards at 300 watts. So with 2 drivers and 4 boards you will have a 600 watt light. 100 more watts then my design.
High efficiency boards designed for Horticulture Lighting projects. Boards can be powered from 10 to 150 watts. Ideal for use in grow tents or grow area with reflective walls and grow spaces with limited height. No Thermal Interface Material is required between the QB304 board and flat metal heatsink.
304pcs Samsung 561C top bin Diodes
Connectors rated 300V 9A
Estimated LER 321.60 lm/W
Estimated QER 4.86 µmol/J
Dimensions 6.833" x 11.25
Max current per board 1400mA
Flux Characteristics with 3000K, S6 Bin at 55C
Watts at Board
Lm/W at Board (55C)
μmoles/joule at Board(55C)
This is the QB board spec. So at 1400ma (max board input) your forward voltage is 110.2 VDC. The driver output is 229 VDC max. So you can run 2 boards off one HLG-320H-C1400B driver. This driver will give you the maximum the board can take. 1400ma and 220.4 VDC for 2 boards. I’m sure this is clear as mud now.
Ok so if I used the HLG-240H-C1400B. I’d have some extra power available to wire in the QB-11’s and their max current is max 1400. Diagram on the HLG site shows them wired in parallel with the 288’s. HOw would they be wired with the 304’s?
All the parts are ordered. Meanwell has the 1050’s on backprder until 27Sep. My old light will do the job while the new light waits for assembly. Good thing I ordered the 304’s when I did beccause they are out of stock now. HLG says they are not going to a V2 on the 304’s. They are “thinking of doing something different.”