Two 600 mm clone bars in one carton. 18 W each, a 6500 K spectrum and 37.8 µmol/s per bar — cool, gentle light for rooting cuttings and starting seedlings, sized for a single standard tray or a short shelf rather than a full bench.
Low heat is the whole job
Cuttings have no roots. They cannot replace water they lose, so what kills them is heat and light stress, not a shortage of photons. A clone bar is built the opposite way to a flowering fixture — modest output, cool spectrum, low enough heat to sit close above a humidity dome without raising the temperature inside it.
At 18 W a bar these draw almost nothing and stay cool to the touch. Two bars over a single tray gives you even coverage without hot spots.
Straightforward to mount, and daisy-chainable
U-shaped clips fix to whatever is above the tray — a shelf, a propagation cabinet, the underside of a bench — and the bar clips into them. No ratchets, no hanging hardware, no tent required. The bars are daisy-chainable, so a run of them along a shelf links together and comes off one supply.
Full specifications
| Manufacturer | Digi-Lumen |
| Product / model | Clone Bar 18 W / 600 mm / DLC18 |
| Quantity | 2 bars per carton |
| Power per bar | 18 W |
| PPF per bar | 37.8 µmol/s |
| PPF efficacy | 2.1 µmol/J |
| Colour temperature | 6500 K |
| Bar length | 600 mm |
| Dimming | None — on/off only |
| Mounting | U-shaped clips |
| Certification | ETL UL8800, CE |
| Warranty | 2 years, QBL-backed |
FAQ
18 W or 25 W bars?
Length, mostly. These are 600 mm and fit a single standard propagation tray or a short shelf. The 25 W bars are 1120 mm and suit a full-length bench or a wide tray. Both are 6500 K and both come two to a carton. Measure the space first — it is the only decision that matters here.
Why is the efficacy lower than your other lights?
Because it is a different job. 2.1 µmol/J against 3.0 on the Extreme fixtures — but at 18 W a bar, efficacy barely registers on a power bill. What matters at the propagation stage is a cool, even, low-heat spread of light close to the tray, which is what these are engineered for.
Can I use these all the way through veg?
They will keep seedlings healthy, but once plants are established you want more intensity. That is where the Extreme 60 W bar or a proper veg fixture takes over. Clone bars are for the first few weeks.