Faven R8 Under Canopy LED Kit – Supplemental Grow Light Bars
Faven R8 Under Canopy LED Kit – Supplemental Grow Light Bars
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
- 14-day returns
- Price match promise
- Free Wembley store pickup
- Advice from the team: 020 3488 0419
Description
Light the Lower Canopy With a Complete Faven R8 Kit
The Faven R8 Under Canopy LED Kit puts everything needed to light the lower canopy into one order: Faven's 120W R8 bars, a pair of adjustable stands for every bar, the Mini Controller for 0-10V dimming, a UK R-Series power cable and the jumper cables each layout needs. Choose the single-bar Starter Kit or one of Faven's own packs, from the 4x4 Kit for a 1.2 × 1.2 m tent or bench up to the Pro Pack XL for a full room. The R8 runs a fixed, red-heavy spectrum (about 80% red) that Faven designed for LED top-light rooms, mixed-light rooms and greenhouses, and each bar delivers 340 µmol/s at up to 2.9 µmol/J.
What's Included
- Starter Kit (1 Bar): 1 × Faven R8 120W bar, 1 pair of adjustable stands, 1 × Mini Controller, 1 × R-Series UK power cable
- 4x4 Kit (2 Bars): 2 × R8 bars, 2 pairs of adjustable stands, 1 × Mini Controller, 1 × power cable, 1 × 3 ft jumper cable
- 4x8 Kit (4 Bars): 4 × R8 bars, 4 pairs of adjustable stands, 1 × Mini Controller, 1 × power cable, 1 × 3 ft jumper cable
- Pro Pack (8 Bars): 8 × R8 bars, 8 pairs of adjustable stands, 1 × Mini Controller, 1 × power cable, 2 × 3 ft jumper cables
- Pro Pack XL (16 Bars): 16 × R8 bars, 16 pairs of adjustable stands, 1 × Mini Controller, 1 × power cable, 2 × 3 ft jumper cables
Key Benefits
- Everything in one order – bars, a stand pair for every bar, the Mini Controller, a UK power cable and the jumpers the layout needs.
- Red-heavy R8 spectrum – about 80% red, tuned by Faven to balance LED top lights and greenhouse sunlight.
- 340 µmol/s from 120W per bar – up to 2.9 µmol/J through a diffused optic lens that avoids hot spots close to the plant.
- IP66 sealed one-piece housing – internal driver, built to cope with foliar sprays and washdown.
- Up to 20 bars per power cable – extend any kit later with single R8 bars and jumper cables.
- 5-year Faven warranty on every fixture.
Why Lower Growth Falls Behind
Overhead light loses intensity quickly as it passes through a dense canopy, so the lower flowering sites develop more slowly, finish smaller and lack the colour and density of the top. Many growers strip that growth away, which costs labour and gives up part of the crop. Under-canopy bars put light where top lights cannot reach, adding roughly 35–50 cm of usable canopy depth (Faven's figure is 14–20 in) and evening out light penetration from the top of the plant to the bottom. Faven report yield increases of 20–30% where their bars are added.
How to Use
- Position: clip each bar onto its stand pair at 20, 25 or 30 cm (8, 10 or 12 in) and run it between the plant rows, with the base no lower than the lip of the pot or slab.
- Connect: link bars end to end along a row, bridge to the next row with the 3 ft jumper, and plug the power cable into the first bar.
- Control: plug the Mini Controller into the communication lead on the power cable and set 1–9 or F (full power). It dims only, so switch the bars on and off with a timer on the same schedule as your top lights.
- Ramp up: start the bars at their lowest setting (about 40%) as flowering begins and bring them to full power over the first two to three weeks.
- Target: aim for 500–800 µmol/m²/s in the lower half of the plant and clear any leaves touching or shading the bars.
- Water and feed: the extra light raises demand – Faven suggest around 10–15% more irrigation volume and about 10% higher EC, adjusted to how the plants respond.
Technical Specifications
- Power draw: 120W per bar
- PPF: up to 399 µmol/s per bar
- Efficacy: up to 3.28 µmol/J per bar
- Fixture size: 115.7 x 7.5 x 8.5 cm (45.6 x 2.9 x 3.3 in) per bar
- Fixture: Faven R8 under canopy LED bar, fixed spectrum (about 80% red)
- Kit power draw: Starter 120W · 4x4 240W · 4x8 480W · Pro Pack 960W · Pro Pack XL 1,920W
- Suggested footprint: Starter about 0.6 × 1.2 m · 4x4 1.2 × 1.2 m · 4x8 1.2 × 2.4 m · Pro Pack about 2.4 × 2.4 m · Pro Pack XL about 2.4 × 4.8 m (Faven's density of two bars per 1.2 × 1.2 m)
- Stand heights: 20, 25 or 30 cm (8, 10 or 12 in)
- IP rating: IP66, sealed one-piece housing
- Driver: Internal
- Input current: 0.43–1.0 A per bar
- Daisy chain: Up to 20 bars per power cable
- Dimming: Mini Controller (0-10V, levels 1–9 and F) or any 0-10V lighting controller
- Maximum ambient temperature: 35 °C
- Certifications: ETL, DLC, CE, FCC
- Warranty: 5 years
Frequently Asked Questions
Which kit size do I need?
Faven size their packs by footprint: two bars light a 1.2 × 1.2 m (4 × 4 ft) tent or bench and four bars a 1.2 × 2.4 m (4 × 8 ft) area, with the Pro Pack and Pro Pack XL scaling the same density to larger rooms. Single Faven R8 bars can be added to any kit later, up to 20 on one power cable.
Do I need a timer?
Yes. The Mini Controller only dims the bars (levels 1–9 and full power) and cannot switch them on or off, so run the power cable from a timer or contactor set to the same schedule as your top lights.
Can I run the bars from my existing lighting controller?
Yes, the R8 accepts any 0-10V dimming signal. Faven list TrolMaster Hydro-X and Hydro-X Pro, GrowFlux and the VIVOSUN GrowHub E42A as working, and Gavita and Luxx controllers as not compatible. The CX2 controller is for the Faven Chroma only.
Should I choose the R8 or the Chroma?
The R8 has a fixed, red-heavy spectrum built for LED top-light rooms, mixed-light rooms and greenhouses, run from the simple Mini Controller. The Faven Chroma adds an adjustable R4–R9 spectrum and a separate 15W far-red channel, controlled by the CX2.
Works Well With

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.



