Are two 65w quantum boards equivalent to 120w? I already have a 65w one and I didn’t want to buy a 12
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I’m really not sure, but I would imagine! My Diablo light is split into two sections, although it’s a one piece light.
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The two lamps should replace the 120-watt lamp and illuminate the area well.
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Hello hello!
I think what really matters is not wattage, but the PPFD your plants are receiving at canopy level. Two 65 W quantum boards draw about 130 W total, so from an energy standpoint they are already comparable to a single 120 W fixture. Whether they truly “replace” it depends on the PPFD you achieve over your grow area.
Based on the GWJ guide, these are the reference ranges:
Vegetative stage: around 300–600 µmol/m²/s
Flowering stage: around 700–900 µmol/m²/s
If your two 65 W boards can deliver those PPFD values evenly across the canopy, then yes, they can absolutely work as an alternative to a single 120 W light. In fact, using two boards often helps with better light spread, more uniform PPFD, fewer hot spots compared to a single point-source light
The key recommendation from the guide is to measure or estimate PPFD at canopy height, rather than relying on wattage alone. That’s the most reliable way to know if your lighting is adequate for each stage of growth.
Here’s the guide for reference, which explains this in detail and includes target ranges and measurement tips:
So in short: if your PPFD is in range, two 65 W quantum boards are a perfectly valid solution and not a waste of money at all.
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I have two 60w, it works well for me. During veg, I only have one on; during flower, I turn both on.
It works for me.
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I appreciate all the responses; they were very helpful.
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Welcome to the community! Those are way overdue, get them in soil asap
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I should plant them already
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Yes absolutely, anything even half that length is more than enough.
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Ideally you want to plant while it is still a root poking out of the seed casing rather than letting it progress that far.
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I have natural soil, I don’t have substrate, can I do it anyway??
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Yes, planting into anything is going to be better than nothing at this point
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First of all, welcome @Elpana333, normally you plant them when the seeds open and the taproot emerges. You could mix the soil with sand, small stones 0.3 - 0.5 mm, or finely chopped straw to give it better drainage and ventilation.
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Now that you have done it i would just leave it be and let it settle in. It should be fine
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Why does it have those colors on the tips? I put them in soil 5 days ago and they are barely that size.
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How about, my grower friend… it’s normal for not planting them right after their dominant root emerged. You were very lucky with them to be so green, thick, and beautiful… the cotyledons are less important now
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They look pretty good considering you planted them so late. I wouldn’t worry about it yet.
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