Do I need more light?

[Fortuno]

It's my first post here so hello everyone. Also first grow :-)

My setup looks like this:

Growbox: HomeBox Ambient 80x80x180 cm - roughly 2.5 x 2.5 x 6 feet. It has white lining inside instead of silver.

Light: HLG Quantum Board 135W v2 Rspec LED Kit

Soil: BioBizz Lightmix

2x 4 gal fabric pots

I'm growing 2 Sweet Zkittlez from Royal Queen Seeds. They have already sprouted and today I'm planting them in soil. I'm planning to use SCROG net when they grow.

Now, I know the HLG QB is enough for veg phase for my growbox but I'm concerned about flo. Should I add some supplemental lights when I switch them to flowering? I was thinking about something like 2x Secret Jardin TLED 26W Blooming tubes on the sides.

What do you think? Will my QB be enough or will lack of light in flowering phase decrease my yield noticeably?

[Obi-Wan]

The QB 135 kit has a recommended flower foot print of 2x2. They say max 2x3 but you’re only getting 24 watts per sq/ft so it’s underpowered. I do think you need more light. If it were me I’d buy another QB 135 kit and run them both dimmed to 100 watts each. You’ll have better light spread with more light if you need it and the ability to dim them when you don’t. Amazon shows the 26w lights you were referring to at $64 each($128 for 2) vs. $200 for the 135 kit.

[Fortuno]

Thanks for your advice on this. I'm based in the EU so the prices are different and also HLG boards aren't available directly in my country. Another QB would be more than double the cost of 2 of those Secret Jardin tubes so I'll have to think this through. I will do more research on supplemental lights options while my girls grow.