Propagation Lighting

A propagation light roots cuttings and keeps seedlings short with low, even output that won't scorch tender leaves. Pick LED clone bars for multi-tier racks and T5 strips for home seed shelves. A germination kit with a dome suits one tray at a time.

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Propagation Lighting

Propagation Light: LED Clone Bars, T5 Strips and Germination Kits

A propagation light gives seedlings and fresh cuttings gentle, even light while roots form. This collection covers LED clone bars, T5 strip lights and germination kits that pair a dome with built-in lights. Brands include Gavita, ThinkGrow, SunBlaster, Super Sprouter and AC Infinity. For a hands-on comparison, read our review of LED grow lights for seed starting....

Propagation light infographic: LED clone bars, T5 strips and germination kits, hang height and hours for clones

Young plants need far less light than a flowering canopy, so clone and seedling lights run low wattage and cool. Pair them with humidity domes and cut trays, or browse all propagation supplies. Larger veg fixtures sit under T5 fluorescent grow lights.

Types of Propagation Lighting

LED Clone Bars

The Gavita LED Clone Bar draws 18W for 35 µmol/s at 9000K, and up to 20 bars link on one feed. The ThinkGrow Model-C 2-pack gives 36 µmol/s per 44 in bar from one full spectrum channel. Both are IP66 rated for humid rooms. Pick these for multi-tier clone racks.

T5 Strip Lights

SunBlaster T5 HO strips come in 3 ft at 39W and 4 ft at 54W, all at 6400K. The NanoTech 4 ft version adds a fitted reflector. The Super Sprouter 18 in T5 draws 17W and rides on a light track dome over one tray. Pick T5 for home seed racks with 36 or 48 in shelves.

Germination Kits With Lights

AC Infinity dome kits hold 40 cells (5x8) or 72 cells (6x12) under two Samsung LM301H EVO bars on a four-level timer. Each size comes with or without a seedling heat mat. The Super Sprouter Premium kit adds a heat mat, a 7 in vented dome and an 18 in T5. Pick a kit for a first tray.

How Growers Use Propagation Lights

Start T5 strips an inch or two above the trays and raise them as plants gain height. LED bars like the Model-C hang more than 6 inches up. Crack the dome vents as roots form so cuttings harden off. Move plants to a veg fixture once they outgrow the tray.

Frequently Asked Questions

How many hours of light for clones?

Most growers run clones and seedlings on 16 to 18 hours of light a day, and some run 24 hours until roots show. Keep the schedule steady with a timer. The AC Infinity kits include a controller that repeats the same daily cycle, so cuttings never miss a light period.

How close should grow lights be to seedlings?

It depends on the fixture. SunBlaster lets its T5 tubes sit an inch or two above the canopy because fluorescent light fades fast with distance. ThinkGrow asks for more than 6 inches between the Model-C and the plant tops. Raise any light as seedlings grow so they stay compact.

What color light for clones?

Clones do best under cool, blue-leaning light that keeps internodes short. SunBlaster and Super Sprouter T5 tubes run at 6400K, and the Gavita Clone Bar runs at 9000K. The ThinkGrow Model-C uses a full spectrum channel tuned for root growth and first leaves.