Those LEDs by the pic in the add next to the wall plug look like 5mm LEDs.
Add says 2-4 inches from plant and covers a 16X16 area with a 12 inch panel.
Doesn't sound like it's very bright.
When I played with 5mm LEDs it takes several 3x4in panels with 100+ Leds on each to be bright enough to grow plants.
I don't know what those LEDs are,brightness etc.
The wavelengths are in the plant usable ballpark and the panel is cheap...
10mm LEDs and 5mm LEDs.
Both LEDS would fit on a 12X12 panel spaced differently than each other.
Might want to send them an E mail asking what the panels are made out of and total Lumens.
If you can afford the $ and it's not bright enough you can use it for supplimental light with what you have now.
In my experiance with LEDs 2-4 inches would be too close for them.
LEDs are mini spotlights and close up you would only be shining a few at a given area.
Farther away the beams can overlap and there will be a few more lumens per sq. inch or whatever.
It also depends on the LEDs angle of the beam their LEDs are.
You get an example of what I mean by angle of the beam in my pics.
10mm LEDs are 40degree angle.The blue are about 15 degree.
Wider the angle the closer to the plants you have to put them and the tighter the angle the farther away you can put them.
Wider angled ones loose lumens faster from far away in general.
Led pics were all taken at the same time.
LEDS are bright enough in the pic to make the background look dark when the room lighting is on in both pics.
Red is about a little over 100 lumen.
Blue is probably well under 5 lumen.
Camera doesn't take good pics of LEDs when they are on.