Clone Bar vs Panel Grow Light: Which Fits Your Setup?
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Short answer: choose a clone bar when the growing area is long, narrow or divided across a shelf or tray and a slim linear fixture matches that geometry. Choose a panel grow light when one compact fixture needs to serve a more continuous canopy or act as the main light in a small setup. Neither shape is universally better. Measure the usable area and height, then compare current output data, controls and installation requirements for the exact products.
Clone bar and panel differences at a glance
| Decision point | Clone bar | Panel grow light |
|---|---|---|
| Physical format | Slim, linear fixture that can follow a shelf or tray. | Compact panel intended to serve a more continuous area from one fixture position. |
| Layout question | Where should one or more bars sit along the length of the growing area? | Where should the panel sit relative to the centre and outer parts of the canopy? |
| Common documented use | Propagation shelves, nursery benches, seed-starting trays and rack-based supplemental lighting. | Compact canopies, grow tents, propagation racks, nursery areas and focused supplemental zones. |
| Best evidence to review | Bar length, fixture quantity, power per bar and a documented distribution map or placement reference. | Panel dimensions, PPF, a documented distribution map or PPFD reference and supported controls. |
The table describes a buying framework, not a performance ranking. A product's shape does not establish its usable output, coverage or plant result.
Start with the shape of the growing area
Draw the usable plant area as a simple rectangle or set of rectangles. A shelf or tray may be long and shallow, while a compact tent or open canopy may be closer to a single continuous block. Record the width, depth and available vertical space before comparing product labels.
A linear bar can match a narrow shelf because its fixture body follows one axis of the area. A panel concentrates the installation around one fixture body and may be easier to plan when the area is not divided into several narrow lanes. These are physical-fit observations only. They do not prove that every bar layout is even or that every panel covers the full area.
Choose a clone bar when modular placement matters
The current EU listing for the Nanolux GrowLink T8 LED PGF18E Clone Bar describes a slim 18W full-spectrum bar for cloning shelves, nursery benches, seed-starting trays and rack-based supplemental lighting. Each retail box contains two bars.
That format gives a buyer two fixture positions to plan, but it does not automatically establish spacing or uniformity. Review the shelf length, the gap between bars, access to trays and the cable route as one layout. The live product page also presents a PPFD reference map with a stated condition of 20 cm height at 18W input power. Keep those conditions attached to the map instead of copying its readings to a different height or configuration.
Choose a panel when one compact fixture should anchor the layout
The current EU listing for the Nanolux RG150 describes a 150W full-spectrum slim panel for compact primary-light, nursery and focused supplemental use. Its product information lists up to 380 µmol/s PPF.
A panel can be the simpler physical starting point when you want one fixture location above a compact canopy. The planning work still remains: compare the panel dimensions with the usable area, preserve access around the plants and confirm the hanging-height and target-PPFD context. The current RG150 page explicitly says that use in areas approaching 100×100 cm depends on crop stage, hanging height, canopy density and target PPFD; it is not a blanket coverage promise.
Do not use wattage as a form-factor shortcut
The GrowLink T8 example is listed at 18W per bar, while the RG150 is listed at 150W. Those figures describe electrical input for different products and system scales. They do not, by themselves, tell you where the light lands or whether one format fits your canopy.
Use separate evidence for separate questions:
- Fixture dimensions and quantity describe the hardware you need to place.
- Input power describes the stated electrical input under the documented condition.
- PPF describes total photosynthetic photon output for the fixture.
- PPFD maps or measured readings describe photon density at positions on a defined plane under stated conditions.
- Control documentation describes which adjustments or system connections the exact fixture supports.
The DesignLights Consortium's horticultural application-design guidance likewise treats facility height, fixture height, fixture-to-canopy distance and fixture optical/output parameters as combined inputs to achievable PPFD. That is why form factor should begin the fit review, not end it.
Compare the complete installation footprint
| What to measure | Why it affects the decision |
|---|---|
| Usable width and depth | Shows whether the growing area is one compact block or several narrow zones. |
| Available vertical clearance | Must accommodate the fixture, its supported mounting arrangement and the distance to the canopy. |
| Fixture count | Two bars and one panel create different mounting, cable and access plans. |
| Routine access path | The fixture layout should not block normal inspection, tray movement or other care. |
| Control and cable location | Confirm the exact product documentation and keep connections clear of the normal work path. |
| Comparable output evidence | Use PPF and PPFD information with its model, height, power and measured-area context intact. |
Record these measurements before deciding. A layout that looks tidy in a product image can still be a poor physical fit if it blocks a tray, leaves no adjustment room or relies on an undocumented test condition.
A simple selection process
- Measure the usable growing area and divide it into real shelf, tray or canopy zones.
- Record the available height after allowing for the fixture body and supported mounting arrangement.
- Decide whether the space is best represented by a long narrow lane or one compact continuous area.
- Compare the exact product dimensions, fixture quantity and current intended-use wording.
- Review PPF and PPFD evidence without mixing models, heights, power settings or map areas.
- Check controls, cables and routine access against the current product instructions.
- Choose the format that produces the clearest documented plan with the fewest unresolved assumptions.
Common comparison mistakes
- Assuming a bar is automatically more even because it is long.
- Assuming a panel covers a square area without checking a documented map or measured setup.
- Comparing watts as though they were a direct measure of canopy light.
- Comparing a two-bar package with one panel without counting fixture positions and connections.
- Using a PPFD image while ignoring its height, power and mapped-area conditions.
- Choosing from a product photo before measuring access and vertical clearance.
Frequently asked questions
Is a clone bar only for clones?
No. Product naming does not define every suitable use. The current GrowLink T8 page also names nursery benches, seed-starting trays and rack-based supplemental lighting. Use the exact product documentation and your measured layout as the boundary.
Is a panel always the stronger option?
No. Shape and output are separate characteristics. Compare current input power, PPF, PPFD evidence and intended use for the exact products rather than assigning performance to the word “panel.”
Can two clone bars replace one panel?
Not as a universal rule. The fixtures can differ in input power, total output, distribution, controls and installation. A responsible comparison needs current data for the exact two-bar arrangement and panel setup.
Which format is easier to expand later?
That depends on the documented connection and control limits, the physical mounting plan and the available circuit. Do not infer expandability from shape alone.
General application-design boundaries were checked against DesignLights Consortium resources. Product status, availability, intended use and listed specifications were checked against live Nanolux Shopify information on September 3, 2026. This article does not state price, inventory quantity, shipping, warranty, certification, discount, customer-result, legal, medical, wiring, installation or yield claims.
