SPECLED Commercial phytolamp Square Sol 240W 3V
Specifications
| Led grow lamp power: | 240W |
| Input voltage range: | 100V - 305V AC, 142V - 431V DC |
| Installed LEDs: | Seoul Semiconductor 3500K, 5000K, 660nm |
| Light temperature: | 3200K |
| Color rendering index - CRI: | 93 Ra |
| Viewing angle: | 140° |
| Dimming: | Built-in 100kOhm potentiometer |
| Length: | 996mm (39.2") |
| Width: | 228mm (9") |
| Height: | 60mm (2.36") |
| Weight: | 2.35kg |
Full Description
Features of the Linear LED Grow Light Square Sol 240W 3V
The linear LED grow light Square Sol 240W 3V is built on four Square Sol 3V LED modules. High-efficiency white Seoul Semiconductor 3500K + 5000K LEDs and 660 nm Seoul Semiconductor (SZDR5A0D) LEDs with a declared output of 5 μmol/s ensure maximum lamp efficiency. Power is supplied by a 240W Mean Well XLG series LED driver.
The form factor of the grow light is linear, with a length of 996 mm and a width of 228 mm. The lamp is ideal for grow tents sized:
- 40×120 cm (0.48 m²);
- 50×120 cm (0.6 m²);
- 60×120 cm (0.72 m²);
- 80×120 cm (0.96 m²) — 2 lamps;
- 120×120 cm (1.2 m²) — 3 lamps (ideal for light-loving plants).
The effectively illuminated area is from 0.4 to 0.7 m² in a rectangular shape. The grow light features a full spectrum, suitable for all types of light-loving plants and the entire growth cycle.
Cooling is passive, achieved through the large surface area of the Square Sol 3V LED modules (520 cm² per module) and by powering the modules with the nominal LED current.
The brightness of the lamp is adjustable from 10–100% using a built-in dimmer (100 kOhm potentiometer).
Square Sol 3V 240W Commercial Grow Light for Growboxes and Growrooms. Review of the Affordable Grow Light
Additional Information
Who is the Square Sol 240W 3V LED Grow Light For?
The Square Sol 240W 3V LED grow light is designed for growers aiming for maximum performance, reliability, and modern components. Its linear form factor (996 mm long and 228 mm wide) ensures an even distribution of photons in a perfect rectangular shape. This solves the main problem of elongated grow tents (e.g., 40×120, 50×120, or 60×120 cm)—the complete absence of dark zones and under-lit edges. The lamp features a true full spectrum with an additional 660 nm peak and works equally efficiently across all stages of development: from early vegetative growth to flowering and fruiting.
Why the Right Spectrum Matters
A full spectrum must be not only "full" but also balanced! The mix of high-efficiency white Seoul Semiconductor (3500K + 5000K) LEDs creates a balanced full spectrum for plant growth while remaining comfortable for the eyes. A powerful boost is provided by specialized 660 nm red Seoul Semiconductor (SZDR5A0D) LEDs with a high output of up to 5 μmol/s. Chlorophyll A absorbs this wavelength with maximum efficiency, so such a dense red peak is guaranteed to increase the final biomass and ripening speed.
Passive Cooling: Silence and Durability
Forget about buzzing fans, dust, and unnecessary maintenance. The grow light's cooling is entirely passive, thanks to the large surface area of the Square Sol 3V LED modules themselves—520 cm² for each of the four modules. Additional reliability is provided by powering the LEDs strictly at their nominal current using an industrial-grade Mean Well XLG series driver (240W). This guarantees absolute silence, minimal crystal heating, zero LED degradation, and many years of uninterrupted operation.
Flexible Settings for Your Grow Tent
The built-in potentiometer-based dimmer (100 kOhm) allows you to smoothly adjust the power from 10% to 100%. You can reduce the intensity for delicate seedlings and crank the lamp to maximum when the plants need all the light energy they can get. A single lamp perfectly illuminates an area of 0.4 to 0.7 m². Thanks to its well-thought-out form factor, the lighting is easy to scale: two lamps will perfectly cover an 80x120 cm tent, and three will create ultimate conditions for the most light-loving crops in a 120x120 cm setup.
The Square Sol 240W 3V grow light is a perfectly balanced tool in terms of price and quality for those who choose advanced Seoul Semiconductor technologies and measure light quality by real yields.
Frequently Asked Questions
The effective coverage area directly depends on the type of crop you are growing. For light-loving plants, the effective illumination area is calculated using the formula of 400–600W per 1 m², depending on the growing conditions and desired results. A standard 240W grow light can effectively illuminate up to 0.75 m², but for ideal results in an area of 0.7 to 1.2 m², we recommend installing two lamps.
Use the above recommendations for the SPECLED Commercial phytolamp Square Sol 240W 3V model while considering the crops you plan to grow. There is no single definitive answer in horticultural lighting: with supplemental CO2, light intensity can be increased up to 1000W per 1 m², provided that microclimate parameters are strictly maintained.
At the same time, for less demanding crops (greens, lettuce, microgreens), the effective coverage area can be doubled and is limited only by the physical dimensions of the LED grow light.
We recommend combining several of these lamps to create an even rectangular or square lighting footprint without shadows.
Like all the lamps we build, the SPECLED Commercial phytolamp Square Sol 240W 3V features excellent passive heat dissipation. During operation, the fixture gets warm but does not overheat. Additional cooling fans directed at the grow light itself are not required. However, we strongly recommend using inline duct fans and clip-on fans inside the grow tent to ensure proper air circulation and mixing around the plants, which helps prevent mold formation. You can read more about air circulation and temperature control in a grow tent in our article "Why Air Circulation Fans Are Essential" ↗.
There is no single figure in centimetres here — it depends on the power of the specific model and the dimensions of your tent. What matters is not the mounting height itself, but the light intensity the plant receives at the canopy (PPFD, µmol/m²·s). Hanging height and dimmer position are simply the two tools you use to bring the light to the level required for the current growth stage.
Target PPFD values by growth stage:
- Germination, seedlings, clones: 100–300 µmol/m²·s. Excess light harms young plants — at this stage the lamp is hung higher and dimmed down.
- Vegetative growth: 300–600 µmol/m²·s. Lower the light and add power to build dense green mass.
- Flowering and fruiting: 600–900 µmol/m²·s. Peak output. Values above 900 only make sense with CO₂ supplementation — without it the plant cannot use the extra light anyway, and you simply risk light stress.
How to set these values in practice:
The accurate method is to measure PPFD with a quantum meter (or a lux meter converted using the coefficient for your spectrum) right at canopy level, then adjust height and power to land within the range for the stage. If you have no meter, start with a greater height and medium power, then gradually bring the lamp closer and raise the dimmer while observing the plant over several days. For more on what PPF and PPFD mean↗, see the dedicated article.
The plants themselves are your main indicator. Signs of excess light: paling or yellowing of the upper leaves, edges curling into a "canoe" shape, bleaching of the canopy directly under the centre of the lamp. Signs of insufficient light: stretching of stems and internodes, thin "leggy" shoots, leaning toward the light source. If you see stress, raise the lamp and/or reduce power; if you see stretching, lower it or increase brightness.
The dimmer on SPECLED Commercial phytolamp Square Sol 240W 3V lets you move smoothly through every stage with a single lamp, without rehanging it each time: adjust the light with power more often, and change the height as the plants grow, keeping the target PPFD at the canopy.
Whether you are planning to buy an LED grow light or already own one and want to check how efficiently and uniformly it illuminates your grow tent, you can use our 3D lighting simulator. Based entirely on your custom parameters, our 3D simulator will generate a fairly accurate lighting calculation and map out the light distribution↗ for your grow space.
A standard lux meter measures light based on human eye sensitivity, whereas PPFD measures the actual photons driving photosynthesis. Because of this difference, there is no single universal formula. To get the PPFD value, you must multiply your lux reading by a specific conversion factor that depends entirely on your light source's spectrum (e.g., HPS, Sunlight, or specific LED color temperatures). To get an accurate estimate in seconds without searching for multipliers, use our Lux to PAR conversion↗ tool. Just select your light type or adjust the spectrum manually, enter your lux reading, and the widget will do the math for you.
Customer Reviews
0No reviews yet. Be the first!
Only registered users can leave reviews.
Login to Write
