G63-V8W Under-Canopy Interlighting Bar for High-Wire Greenhouses: G19F vs V8W Spectrum Selection (PPF 360 µmol/s, up to 3.0 µmol/J)

Overview

The Koray G63 is the RX-G63-series under-canopy interlighting bar from the 2024 official range: a 1200 x 63 x 63 mm V-shaped module with double-sided emission, hung between crop rows to light the middle and lower canopy that top lighting never reaches. The official series sheet lists the same physical bar in two spectral versions – G63-G19F and G63-V8W – and the two are easy to confuse because the housing, wattage and mounting rules are identical. This article is a selection guide for greenhouse teams: what each spectrum is, which photon numbers the official sheet assigns to it, and what choosing V8W actually buys on the G63 platform. Every figure below comes from Koray’s official RX-G63 series datasheet PDF (2024) and the G63-B spec-table image on the official product page; official values are factory-measured with a tolerance of +/-10%.

Key Specifications

One platform, two spectral options. Official values from the RX-G63 series sheet (identical on the G63-B spec-table image and the datasheet PDF):

Series footer (applies to both spectra): waterproof IP66; illumination angle 120 degrees; recommended irradiation distance 0.1-0.5 m; operating temperature -30 to 40 degrees Celsius; lifespan 35,000 h (Ta 25 degrees Celsius); certifications CE / RoHS / FCC.

What V8W Changes on the G63 Platform

G19F and V8W are the same 120 W bar; what changes is the spectrum and, with it, the photon output. On the official spectral graphs, G19F shows a blue-plus-red profile, while V8W concentrates its energy in the red region. The official sheet pairs each spectrum with its own photometric column: moving from G19F to V8W raises PPF from 320 to 360 µmol/s, efficiency from 2.7 to 3.0 µmol/J, and PPFD from 930 / 480 / 320 to 1050 / 540 / 360 µmol/m²/s at 0.1 / 0.2 / 0.3 m. The series datasheet headlines this as the high-efficiency option – “high efficiency up to 3.0 µmol/J (V8W spectrum)” – which means more photosynthetically active photons reach the shaded leaf zone for the same wattage and the same mounting height.

G19F vs V8W: How to Choose for High-Wire Crops

Because both spectra ride on the same bar, the choice does not change the installation plan – the same V-shaped double-sided emission, the same 120-degree illumination angle, the same 0.1-0.5 m recommended distance from the canopy. Selection is really about two variables:

• Photon budget. If the job is pushing the highest PPF and PPFD at 120 W into a dense, shaded lower canopy, V8W is the official high-output answer: 360 µmol/s and 1050 µmol/m²/s at 0.1 m, 540 at 0.2 m, 360 at 0.3 m.
• Light quality. G19F keeps a broader blue-plus-red profile, the classic general-purpose choice for vegetative growth and morphology; V8W is the red-enhanced spectrum, the profile greenhouse teams typically pair with generative, yield-focused phases.

The official series copy positions the G63 for high-wire crops such as greenhouse tomatoes and cucumbers, boosting yield “during the darker periods of the year” and re-using shaded leaves for photosynthesis. In practical terms a grower can run G19F bars through the vegetative stretch and switch rows to V8W as the crop moves into fruiting – or use the V8W numbers above to plan the interlighting pass where light is the limiting factor.

Inside-the-Canopy Facts That Stay the Same

Whichever spectrum is specified, the environment ratings come from the same series sheet. The bar is IP66-rated, which matters for the humid microclimate between crop rows. Operating temperature spans -30 to 40 degrees Celsius, so cold greenhouse winters and warm summer periods are both inside the window. Lifespan is 35,000 h at 25 degrees Celsius. Input is AC100~277V with PF above 0.9, and up to 5 bars can be connected in series per run – enough for a long interlighting pass down a high-wire row. All optical and electrical data carries the official +/-10% tolerance.

In the Greenhouse: V8W Bars between High-Wire Cucumber Rows

The scene below shows the configuration this article is about: one G63-V8W bar hung horizontally at lower-canopy height between two high-wire cucumber rows, its V-shaped double-sided emission washing both sides of the leaf curtain at close range. The bar sits roughly 0.2-0.4 m from the foliage, inside the official 0.1-0.5 m recommendation, with the pink-warm glow of the lit modules visible through the frosted cover.

FAQ

Q: What is the G63-V8W? A: The V8W spectral version of Koray’s RX-G63-series under-canopy interlighting bar (1200 x 63 x 63 mm, 120 W, V-shaped double-sided emission, IP66). Official 2024 datasheet model naming: G63-V8W.

Q: How does V8W differ from G19F on the same bar? A: Same housing, same 120 W, same mounting rules. V8W is the red-enhanced, high-efficiency spectrum: PPF 360 µmol/s and up to 3.0 µmol/J, versus G19F’s 320 µmol/s and 2.7 µmol/J.

Q: What PPFD does the V8W version deliver? A: 1050 µmol/m²/s at 0.1 m, 540 at 0.2 m and 360 at 0.3 m (official sheet, +/-10%).

Q: Which crops is the G63 family positioned for? A: Official copy names tall high-wire crops such as greenhouse tomatoes and cucumbers; the bar is designed to light the shaded middle and lower canopy.

Q: How many bars can be connected? A: Up to 5 pcs in series. Input AC100~277V, PF > 0.9; recommended mounting distance 0.1-0.5 m from the canopy.

Q: Environment and life ratings? A: IP66; operating -30 to 40 degrees Celsius; 35,000 h at Ta 25 degrees Celsius; CE / RoHS / FCC.

Why Choose Koray

Koray (Zhongshan Koray Photoelectric Co., Ltd.): LED grow lights since 2008; 1,000+ professional growers served; 300+ patents; National High-Tech Enterprise; exports to 20+ countries/regions. Figures sourced from the official G63 product page, its G63-B spec-table image and the official RX-G63 series datasheet PDF (2024) – koraylights.com.