Overview
The Koray TR40W is a 40 W track-mounted spotlight from the official RX-TR40W range. On the current official product page and the 2024 datasheet, this lamp is listed with the A92 spectrum, the option intended for general foliage, ornamental flowers and other indoor ornamental plants. Before choosing a fixture, most living-room displays raise a planning question that has nothing to do with the lamp itself: how high should it hang, how wide will the pool of light be on the shelf or cabinet below, and how many fixtures does one bookcase, sideboard or showcase need? This article answers that question with the official A92 coverage and photometric figures, so mounting height and fixture layout can be decided first. Every number below comes from Koray’s official RX-TR40W datasheet PDF (2024 v1.0) and the current official product page; optical and electrical data are factory-measured with a tolerance of +/-10%.
Key Specifications
Official A92 values used in the planning tables of this guide (datasheet table row TR40W / A92, cross-checked against the product-page bullets):
| Parameter | Official value (A92) |
|---|---|
| Spectrum option | A92 (general foliage / ornamental plants) |
| Lamp body | Ø 88 mm x 203 mm |
| Power box | 160 x 38 x 30 mm |
| Power / Input | 40 W; AC100~240 V (product page bullet; datasheet table nominal AC220 V) |
| Luminous flux | 4500 lm |
| PPF | 70 µmol/s |
| PPFD @ 1 m | 350 µmol/m²/s (min angle) / 66 µmol/m²/s (max angle) |
| PPFD @ 2 m | 88 µmol/m²/s (min angle) / 18 µmol/m²/s (max angle) |
| Coverage @ 1 m height | max Ø 1 m / min Ø 0.28 m |
| Coverage @ 2 m height | max Ø 2 m / min Ø 0.56 m |
| Working distance | single lamp 0.5-2 m; multiple lamps 3-5 m effective planting distance |
| Certifications | CE / RoHS / FCC (tolerance +/-10%) |
The lamp body is a Ø 88 x 203 mm cylinder with a separate 160 x 38 x 30 mm power box. The head tilts on its joint for aiming, and the track adapter lets the fixture slide to any position along a conductive track, so height and aim can be tuned after installation without moving furniture.
Mounting Height First: Beam Diameter at 1 m vs 2 m
Height is the first planning decision because it fixes the diameter of the light pool. Official A92 coverage at 1 m below the lamp head spans a maximum of Ø 1 m in the wide (max-angle) setting, with up to 66 µmol/m²/s at the centre, down to a minimum of Ø 0.28 m in the narrow (min-angle) setting, with up to 350 µmol/m²/s at the centre. Move the same lamp to 2 m and the two settings expand to Ø 2 m (18 µmol/m²/s) and Ø 0.56 m (88 µmol/m²/s).
Two planning patterns follow directly from these figures. First, doubling the height roughly doubles the pool diameter and drops the centre reading by about a factor of four: the official pairs 350 to 88 and 66 to 18 µmol/m²/s show the same inverse-square behaviour in the narrow and wide settings. Second, height is the lever that fits one 40 W lamp to differently sized displays: hang it close to 1 m above a sideboard, cabinet top or single specimen shelf, and closer to 2 m above a tall bookcase or a display whose lower shelves must also receive light.
The official 1 m PPFD map below shows both beams on the same 10 x 10 cm measurement grid: the narrow spot reaches 350 µmol/m²/s in the centre cell while the wide wash reaches 66 µmol/m²/s over a broader footprint.
One Lamp, Two Plant Groups: Narrow Beam or Wide Wash
Koray’s official copy pairs the beam settings with plant needs in plain terms: the narrow (min-angle) setting for high-light, sun-loving plants, and the wide (max-angle) setting for low-light, shade-tolerant plants. Because both settings live in the same A92 fixture, a mixed display does not need two lamp types. A single sun-loving specimen in a Ø 0.28 m narrow spot can sit on the same shelf as shade-tolerant foliage washed by the Ø 1 m wide setting: the same 40 W lamp simply concentrates its output for the high-light plant and spreads it for the rest.
As a placement rule of thumb from the official numbers: keep the plant canopy inside the working-distance band of 0.5-2 m. The narrow spot, with up to 350 µmol/m²/s at the centre, belongs to the sun-loving end of the display; low-light foliage should sit under the wide wash or further out in the same beam, where readings fall well below the centre value.
One Light or a Track Run: Layout Distances
The official page gives two distance figures that translate directly into layout rules. A single lamp has a working distance of 0.5-2 m, so one TR40W is the right tool for a single display zone: one plant, one shelf or one cabinet top. When the display runs longer – a wall of bookshelves, a long console or several showcase units in a row – multiple lamps extend the effective planting distance to 3-5 m.
Using the official coverage circles to plan spacing: at about 1 m of mounting height, each wide setting covers roughly Ø 1 m, so lamps spaced about 1 m apart along the same track keep the light band continuous; at about 2 m, the footprints grow to Ø 2 m and the same rule allows spacing of roughly 2 m. These spacing figures are planning derivations from the official coverage values; the official statements themselves are the single-lamp 0.5-2 m working distance and the 3-5 m multi-lamp effective planting distance. They make a sound starting point before fine-tuning with a PPFD meter.
Example: A Track Spotlight above a Living-Room Display
The scene below shows the configuration this guide is about: one TR40W mounted on a short track run above a wooden sideboard display in a living room, aimed down at roughly 45 degrees so the light pool lands on the upper leaves of the feature plant and spills across the cabinet surface. The bookshelf beside it stays in soft shadow, which keeps the eye on the illuminated display. At this working distance – well inside the official 0.5-2 m band – the beam can be left wide to cover the whole cabinet top or narrowed to frame a single high-light specimen, without moving the lamp.
FAQ
Q: How wide is the TR40W A92 beam at 1 m? A: Official coverage is Ø 1 m maximum in the wide (max-angle) setting and Ø 0.28 m minimum in the narrow (min-angle) setting. Centre readings are 66 and 350 µmol/m²/s respectively (+/-10%).
Q: What changes when the lamp is mounted at 2 m? A: The same settings expand to Ø 2 m maximum and Ø 0.56 m minimum, with centre readings of 18 and 88 µmol/m²/s.
Q: How far should the lamp be from the plants? A: Single-lamp working distance is 0.5-2 m. For longer runs of 3-5 m, the official recommendation is to use multiple lamps along the track.
Q: Can one lamp serve both sun-loving and shade-tolerant plants? A: Yes. Koray’s official copy assigns the narrow (min-angle) setting to high-light sun-loving plants and the wide (max-angle) setting to low-light shade-tolerant plants, both on the same A92 lamp.
Q: Is the beam angle adjustable? A: Yes – the TR40W has an adjustable beam angle that sweeps from a concentrated spot to a wide wash, which is how the two coverage circles above are produced on one fixture.
Q: Which spectrum does this guide cover? A: The A92 option only: 40 W, 4500 lm and PPF 70 µmol/s. This article deliberately stays with A92 values.
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 TR40W product page and the official RX-TR40W datasheet PDF (2024 v1.0) – koraylights.com.
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