The 4Seasons 120W Under Canopy is a slim, IP66-sealed LED bar that puts light where your top light can't reach — the lower branches, the inner canopy, and the sides of the plant. It delivers 360 µmol/s at 3.0 µmol/J from a sealed aluminium housing and comes with an adjustable stand so it is ready to position out of the box. It dims through your AC Infinity controller via the Type-A adapter, so it ramps up and down on the same schedule as your main light. Stocked and supported in Sydney.
Light the part of the plant top lighting misses
Even a strong top light loses intensity quickly as it travels down through a dense canopy. Once plants fill out in flower, the lower sites are working in shade — they grow slower and finish lighter than the tops. An under-canopy bar fixes that directly by lighting those sites from below and the side, so more of the plant contributes to the harvest.
At 360 µmol/s from 120W, this bar adds a meaningful amount of usable light to the lower canopy while adding only modest heat to the tent.
Built for the wet part of the tent
The lower canopy is the most humid, splash-prone part of any grow. The fixture is IP66 rated — dust-tight and protected against powerful water jets — in a sealed aluminium housing, so it is at home in humid tents, hydroponic systems and greenhouses. Use it on the included stand under the canopy, or mount it for top or side lighting.
Dimmed by your AC Infinity controller
The 120W Under Canopy uses 0–10V dimming through an RJ11 port and has no dimmer on the fixture itself. Connect it to a Controller 69, 69 Pro or Controller AI+ with a UIS Lighting Adapter Type-A ($44.95, sold separately) and you get full dimming, scheduling and sunrise/sunset ramps from the app.
Specifications
| Power draw | 120W |
| Light output (PPF) | 360 µmol/s |
| Efficacy | 3.0 µmol/J |
| Spectrum | Full spectrum |
| Ingress protection | IP66 |
| Housing | Sealed aluminium |
| Dimming | 0–10V via RJ11; no on-fixture dimmer; AC Infinity control via Type-A adapter |
| Power factor | >0.98 |
| Mounting | Under-canopy on the included adjustable stand, or top and side lighting |
| Rated lifespan | 50,000+ hours |
| Warranty | 2 years, handled in Sydney |
FAQ
Does it come with a stand?
Yes, an adjustable stand is included, so you can position it under the canopy straight away.
Can I dim it without a controller?
There is no dimmer on the fixture, so on its own it runs at full output. To dim it, connect it to an AC Infinity controller with the Type-A adapter — which also lets it follow the same schedule as your main light.
When should I add under-canopy lighting?
Once plants have filled out and the lower canopy is visibly shaded — usually from early flower onward. Bring it on at low intensity and raise it over a week or two so the lower growth adapts.
Is it safe in a humid tent?
Yes. IP66 means dust-tight and protected against powerful water jets, so humidity, foliar spray and splashes from the reservoir are not a problem.
Is it supported in Australia?
Yes. Quick Bloom Lights stocks and supports 4Seasons here, ships from Sydney and handles the 2-year warranty locally.