The 4Seasons Helios 720 EVO+ is a 720W bar light built around Samsung LM301H EVO diodes, with OSRAM 660 nm deep red and 730 nm far-red for flowering. Tested across a 1.2 × 1.2 m tent it averages 1,162 µmol/m²/s — serious flowering intensity, evenly spread to the corners. It connects to your AC Infinity controller through the Type-A adapter, so it runs on the same schedule and the same app as the rest of your tent. Stocked and supported in Sydney.
Tested output
Measured in a 1.2 × 1.2 m grow tent at 45 cm hang height, full output:
| Average PPFD | 1,162 µmol/m²/s |
| Peak PPFD | 1,444 µmol/m²/s |
A peak-to-average gap that tight is what you want to see. The PCB layout deliberately puts more diodes toward the ends of each bar and fewer in the middle, which flattens out the bright-centre, dim-edge pattern most panels have and keeps the plants in the corners of the tent growing at the same pace as the ones in the middle. At 1,100+ µmol/m²/s you also have headroom to dim back through veg and early flower and still have intensity in reserve for the final weeks.
What the diodes are doing
The primary white array is Samsung LM301H EVO, rated up to 3.14 µmol/J at the diode — the current generation of horticultural white LED. It is backed by Samsung LM301H and 4Seasons 2835 diodes across a 3000K + 5000K blend, giving a broad, balanced white spectrum that plants use efficiently from seedling to harvest.
On top of that sit OSRAM 660 nm deep red diodes, rated up to 3.8 µmol/J, which drive flowering and bud density, and OSRAM 730 nm far-red, which works with the red through the Emerson effect to push photosynthesis harder and speed the transition into flower.
Spreading 720W across 3,226 diodes means each one runs at roughly 0.22W — well under what it is capable of. Oversized aluminium heatsinks run the full length of every bar to carry heat away. Diodes driven gently and kept cool hold their output for longer and convert more of the power they draw into usable light. That is where the 50,000-hour rating comes from.
Runs on your AC Infinity controller
The Helios connects to the Controller 69, 69 Pro and Controller AI+ through the UIS Lighting Adapter Type-A ($44.95, sold separately). From there it dims, schedules and ramps from the AC Infinity app, sharing one set of targets with your inline fan, humidifier and heater instead of running on a timer of its own.
It also has its own on-board 0–100% dimmer, so it works perfectly well on its own and the controller becomes something you add when you are ready.
Specifications
| Power draw | 720W |
| Diode count | 3,226 |
| White diodes | Samsung LM301H EVO, Samsung LM301H, 4Seasons 2835 — 3000K + 5000K |
| Red / far-red diodes | OSRAM 660 nm + OSRAM 730 nm |
| Diode efficacy | Up to 3.14 µmol/J (EVO white), 3.8 µmol/J (OSRAM red) — diode-level ratings |
| Average / peak PPFD | 1,162 / 1,444 µmol/m²/s (1.2 × 1.2 m, 45 cm) |
| Flowering coverage | 1.2 × 1.2 m |
| Vegetative coverage | Up to 1.4 × 1.4 m |
| Heat management | Oversized full-length aluminium heatsinks |
| Dimming | On-board 0–100% dimmer; AC Infinity control via Type-A adapter |
| Weight | 9.5 kg |
| Rated lifespan | 50,000+ hours |
| Included | Fixture, adjustable rope hangers |
| Warranty | 2 years, handled in Sydney |
FAQ
What size tent is it for?
A 1.2 × 1.2 m flowering tent is the sweet spot, with up to 1.4 × 1.4 m in veg. The tested 1,162 µmol/m²/s average is across exactly that 1.2 m footprint, so you are buying a light proven at the size you are running.
How do I connect it to my AC Infinity controller?
Plug a UIS Lighting Adapter Type-A into the light's dimming port and into a free port on your Controller 69, 69 Pro or Controller AI+. The light then appears as a device you can schedule, dim and ramp from the AC Infinity app.
Should I run it at 100%?
Not from day one. Seedlings and clones want a fraction of this output, and most growers step it up through veg and reach full power only in mid to late flower. Running under full power also keeps the fixture cooler and the room easier to manage. If you add CO2, that is when full output earns its keep.
How much heat does it add to the tent?
Like any 720W light, it puts 720W of heat into the space, so size your extraction to suit. The oversized heatsinks shed it evenly across the full fixture rather than concentrating it. Our fan size calculator will help you match the extraction.
Is it supported in Australia?
Yes. Quick Bloom Lights stocks and supports 4Seasons here. The light ships from our Sydney warehouse and the 2-year warranty is handled locally.