1200W of full-spectrum output across a 4×6 ft canopy footprint — UV and far-red dialed in independently, every cycle.
The Flexstar Redline 1200W SpecTune XL is a 12-bar, 4×6 ft flagship LED fixture built around Flexstar's patented Liquid Optics System (LOS) and four independently controllable spectral channels — main white, deep red (660 nm), far-red (730 nm), and UV (395 nm) — so your lighting recipe can be steered through veg, transition, and flower without hardware changes.
The Flexstar Redline 1200W SpecTune XL is the largest fixture in the Redline line — a 12-bar, XL-format panel sized at 44.5″ × 66.1″ to cover a 4×6 ft canopy zone. Total draw is 1,200 W, broken down as approximately 1,000 W main array, 140 W far-red channel, and 60 W UV channel. That power split is what separates the SpecTune from a standard fixed-spectrum fixture: each supplemental channel runs independently, so you're not locked into a single output ratio from seed to harvest.
The core technology is Flexstar's patented Liquid Optics System (LOS). A silicone gel layer fills the space between the LED chips and the outer lens, eliminating the air gap that causes light scatter and heat concentration in conventional bar lights. The result is 99% optical efficiency at the lens surface, measurably lower LED junction temperatures — reduced by up to 15°F versus a non-LOS fixture of comparable wattage — and a fully sealed assembly that won't collect particulate or degrade optically over time.
The 1200W SpecTune XL is aimed at licensed cannabis and hemp operators running commercial flower rooms or high-intensity veg stages where spectral precision matters to end-product quality. If your operation depends on dialing in specific light recipes — pushing far-red at end-of-day to trigger or accelerate flowering, or running UV pulses during late flower to drive secondary metabolite production — this fixture gives you that control at the circuit level, not just via a controller preset.
It also fits operators running multi-tier vertical systems where the fixture needs to perform reliably in high-humidity, high-CO2 environments with regular sanitization protocols. The IP66 rating means it's sealed against both dust ingress and direct water spray — compliant with standard room washdown procedures. For large single-layer rooms, the 4×6 ft XL footprint tiles efficiently across standard bay widths. For multi-tier builds, the slim 2.2″ profile keeps tier clearances workable.
Four-channel spectral architecture (4000K white + 660 nm deep red + 730 nm far-red + 395 nm UV) with each channel independently adjustable from 25–100%. Dimming is handled via RS485 and 0–10V protocols, which makes this fixture compatible with most commercial environmental control systems. Input voltage range is 120–277V, so it works across both single-phase commercial panels and 277V dedicated circuits without a separate driver swap.
Passive fanless cooling — the LOS silicone gel handles bidirectional thermal transfer away from the diode junction, so there are no moving parts to fail or noise signatures to manage. Operating range is rated to 40°C / 104°F ambient. Daisy-chain capacity is up to 200 fixtures per run (per Alibaba spec sheet data), and the Flexstar X5 Smart Controller — sold separately and compatible with this fixture — runs dual independent channels, each controlling up to 100 fixtures with on-screen VPD, humidity, temperature, and CO2 monitoring plus auto-dim and auto-shutdown on temperature overrun.
Certifications: DLC, ETL, CE, RoHS, TISI. DLC listing means this fixture is rebate-eligible through most utility programs in the US — a meaningful cost offset on larger deployments.
In a standard 10×10 ft flower bay, two 1200W SpecTune XL units tile the space at a 4×6 ft footprint each, with the spectral channels synchronized through a single controller channel. In wider single-tier rooms, the XL format reduces fixture count versus smaller wattage units, which simplifies electrical rough-in and wiring labor on new builds.
Because the UV and far-red channels are independent at both the fixture and controller level, operations with multiple strain programs can run differentiated spectral recipes in separate bays from the same controller infrastructure — without needing separate fixture SKUs for each room. This is the practical payoff of the 4-channel SpecTune design: one hardware platform supports the full range of light recipes your cultivation team wants to run, now and as your program evolves.
Flexstar backs the Redline line with a 5-year warranty and rates the fixture at 54,000 hours Q90 — meaning less than 10% lumen depreciation at that lifetime. For a commercial operator measuring ROI across multiple cycles, that output stability translates directly into predictable production planning.
| SKU | FLRL-1200AST-XL |
| Input Power | 1,200 W (Main 1,000 W + FR 140 W + UV 60 W) |
| Efficacy (PPE) | 3.2 µmol/J |
| Fixture Dimensions | 44.5″ L × 66.1″ W × 2.2″ H |
| Bar Count | 12 bars (XL format) |
| Canopy Coverage | 4 × 6 ft |
| Spectrum | 4000K white + 660 nm + 730 nm + 395 nm (4-channel independent) |
| Input Voltage | 120–277 V |
| Dimming Protocol | RS485 + 0–10V |
| IP Rating | IP66 |
| Operating Temp Range | −20°C to 40°C |
| Lifespan | 54,000 hrs (Q90) |
Yes. The SpecTune architecture gives you four independently adjustable channels — main white array, 660 nm deep red, 730 nm far-red, and 395 nm UV — each adjustable from 25–100% via RS485 or 0–10V. You can run the UV and far-red at any combination without affecting the output of the primary channel, which is how you set differentiated light recipes across veg, transition, and flower without swapping fixtures.
Yes. The Redline SpecTune line carries DLC, ETL, CE, RoHS, and TISI certifications. DLC listing qualifies the fixture for rebate programs through most US utility providers. Rebate amounts vary by program and jurisdiction — contact your utility or HSC for current applicable programs in your state.
The 1200W SpecTune XL is compatible with the Flexstar X5 Smart Controller (sold separately). The X5 is a dual-channel controller — each channel manages up to 100 Flexstar fixtures — and it displays live environmental data including temperature, humidity, VPD, and CO2 on-screen. It also includes auto-dim and auto-shutdown functions triggered by temperature thresholds. The fixture also accepts standard 0–10V and RS485 signals from third-party environmental control systems.
Conventional LED bars leave an air gap between the chip and the outer lens, which causes light scatter, creates hot spots at the junction, and allows dust to accumulate inside the housing over time. Flexstar's patented LOS fills that gap with a silicone gel layer. The result is 99% optical efficiency at the lens surface, LED junction temperatures reduced by up to 15°F, and a fully sealed assembly with no internal cavity for particulate to enter — which is why the fixture carries an IP66 rating.
Yes. The 1200W SpecTune XL accepts 120–277V input, so it is compatible with 120V standard, 240V, and 277V dedicated horticultural circuits without any driver change. Specify your voltage when requesting a quote so the correct power cord is included.
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