SunBlaster High Output LED 6400K Strip Light – 24W 2 Foot

The SunBlaster High Output LED 6400K Strip Light – 24W 2 Foot (SKU SL0900702) is a passive-cooled horticultural LED strip built for seedling propagation, clone rooting, and vegetative growth. At 24 watts and 6400K, it delivers cool blue-spectrum light that supports compact, healthy early-stage plant development without generating significant heat — no fans, no moving parts, just a clean, long-life LED array designed to be stacked, daisy-chained, or used as a standalone propagation light over a seedling tray or clone dome.

SunBlaster High Output LED 6400K Strip Light Specifications

Specifications below are for the 24W 2-foot model (SL0900702). Power consumption and line-wide specifications are confirmed from SunBlaster product documentation. Lumen output for this specific wattage variant is not published in the available manufacturer data.

Specification	Value
Brand	SunBlaster
SKU	SL0900702
Fixture Length	2 feet (nominal)
Power Consumption	24 W
Colour Temperature	6400 K
Rated Life	50,000 hours
Beam Angle	120°
Input Voltage	110+ V
Cooling Method	Self-Cooling Technology (passive, no fans)
Weight	1.00 lb
Category	LED Fixtures & Kits — Lighting

Why Choose the SunBlaster High Output LED 6400K Strip Light

Strip lights are a practical format for propagation because they run close to the canopy, spread light evenly across a flat seedling tray, and can be positioned without the overhead clearance that pendant-style fixtures require. Here is what distinguishes this SunBlaster model specifically:

• Self-Cooling Technology (passive operation): SunBlaster engineered this fixture without cooling fans, which means no moving parts to fail and no fan noise in a propagation space. The heat management is built into the fixture’s thermal design, allowing the LED array to operate at its rated output level without relying on active airflow.
• 6400K spectrum for vegetative and propagation work: The 6400K colour temperature sits in the cool-white, blue-heavy range of the visible spectrum. Plants in their seedling and vegetative stages respond well to this range, using it to drive leaf development and compact, upright growth. It is a deliberate choice for an early-growth fixture rather than a general-purpose light.
• 24W output in a 2-foot strip form factor: The 24W draw provides double the power of the 12W 1-foot model in the same strip configuration. This makes it practical for standard 1020 propagation trays and 2-foot propagation domes, which are the most common tray sizes in hobby and professional propagation.
• 50,000-hour rated life: At 18 hours per day of operation, a 50,000-hour rating represents approximately 7.6 years of continuous propagation cycles before the fixture reaches end-of-rated-life. This eliminates recurring bulb replacement costs that apply to fluorescent T5 alternatives.
• Lightweight strip form factor: At just over 1 pound, the fixture is easy to mount, reposition, or stack in multi-tier propagation racks. The low profile keeps mounting hardware requirements minimal.

Best Uses for the SunBlaster High Output LED 6400K Strip Light

This fixture is purpose-built for low-height, close-canopy lighting scenarios in indoor horticulture. It is not a primary canopy light for flowering or fruiting. The following use cases represent its practical range:

• Seed germination and seedling development: Position the strip light 2–4 inches above a germination tray to provide the consistent, moderate light intensity seedlings need to establish without stretching. The 6400K spectrum encourages compact, stocky early growth rather than leggy stems.
• Clone rooting under a dome: Strip lights fit neatly on top of a standard propagation dome lid or can be suspended just above it. Clones benefit from the blue-spectrum light during the root-establishment phase when overhead light supports leaf development while roots are forming.
• Vegetative growth on multi-tier racks: In vertical rack setups where inter-shelf spacing is limited, a low-profile strip light is often the only viable fixture. The 2-foot length aligns well with standard commercial propagation rack shelf widths. For a related propagation setup that pairs a T5 fixture with a heat mat, see the Super Sprouter Premium Heated Propagation Kit with T5 Light.
• Mother plant supplemental lighting: A strip light placed at the side or overhead of a mother plant kept in a low-light space can provide supplemental blue-spectrum light to maintain vegetative status and support continued clone production.
• Microgreen and herb production: The combination of a 2-foot span, 6400K output, and passive cooling makes this fixture equally practical for microgreen trays and compact herb production where high-intensity discharge lighting would be impractical or excessive.

SunBlaster High Output LED vs Similar Strip Lights

The most direct alternative in the same product line is the SunBlaster High Output LED 6400K in the 12W 1-foot configuration (SL0900700). The 24W 2-foot model draws twice the power and covers twice the linear length at the same colour temperature and beam angle. For growers running standard 1020 trays, the 2-foot model typically covers the tray length without requiring two 1-foot units. If tray coverage is not a concern and the goal is spotlighting a small area or fitting into a very narrow shelf space, the 12W 1-foot model is a lower-cost option. The 48W 4-foot model (SL0900704) scales up further for full-length 4-foot shelf coverage.

Compared to T5 fluorescent strip lights, which have historically dominated propagation applications, the SunBlaster LED format eliminates lamp replacement cycles and produces less radiant heat per watt consumed. T5 fixtures such as the T5 Designer 4ft 4-Tube Fixture provide higher total lumen output and broader coverage area but at higher wattage and with ongoing lamp replacement costs. The LED strip format trades raw output for longevity and passive operation.

For growers who have outgrown propagation lighting and need a high-output canopy fixture for full-cycle or flowering production, the Gavita Pro 1700e LED represents a different category entirely — a commercial full-spectrum fixture designed for top-canopy flowering rather than close-range propagation work.

Compatibility

The SunBlaster High Output LED 6400K Strip Light operates on standard North American 110+ V household current and plugs into a standard grounded outlet. No ballast, driver, or external transformer is required — the driver is integrated into the fixture.

The 2-foot strip length is sized to work with standard 1020 propagation trays (approximately 21 inches interior length) and standard 2-foot propagation dome inserts. The fixture’s low profile and lightweight construction make it compatible with most wire propagation racks and multi-tier shelving systems designed for 2-foot shelf depths.

This fixture is designed for indoor use. It is appropriate for controlled-environment growing spaces, grow tents, propagation rooms, and multi-tier vertical rack systems. The passive cooling design means it does not require supplemental airflow around the fixture itself, though a propagation space should still maintain appropriate ambient temperature and humidity for the plants being grown.

SunBlaster strip lights in the same product line (12W 1-foot, 24W 2-foot, 48W 4-foot variants) share the same connector system, making it possible to link multiple strips end-to-end in daisy-chain configurations for continuous linear coverage across longer shelf runs.

Usage Guidelines

Positioning and photoperiod guidance for the SunBlaster LED 6400K strip in propagation and vegetative applications:

• Mounting height for seedlings and clones: Position the light 2–4 inches above the top of the seedling tray or dome. At this range, the 120° beam angle distributes light across the full tray width. Raising the fixture reduces intensity and broadens coverage area; lowering it increases intensity at the centre of the tray.
• Photoperiod for seedlings: Most vegetable and herb seedlings respond well to 16–18 hours of light per day during early development. Clones typically use 18 hours during root establishment to maintain vegetative status. Avoid continuous 24-hour lighting for most species, as a dark period supports consistent metabolic function.
• Photoperiod for vegetative plants: For plants maintained in a vegetative state, 18 hours on / 6 hours off is a standard starting point. The 6400K spectrum does not trigger flowering in photoperiod-sensitive species under long-day (vegetative) lighting schedules.
• Multiple units and coverage: A single 2-foot strip covers a standard 1020 tray. For broader coverage across wider benches or multi-tray setups, additional strips can be connected in sequence or mounted in parallel rows. Refer to SunBlaster’s product documentation for confirmed daisy-chain limits on this fixture model.
• Heat and temperature: The passive cooling design keeps operating temperatures low, but the fixture should not be operated in enclosed spaces with no air exchange. Adequate ambient ventilation keeps overall room temperature stable and supports healthy propagation humidity management.

How to Install the SunBlaster LED Strip Light

1. Plan your mounting position: Measure the shelf or rack space where the strip will be installed. The fixture should span the length of your propagation tray and be positioned to allow 2–4 inches of vertical clearance above the tray surface or dome lid.
2. Attach mounting hardware: SunBlaster strip lights are designed for direct shelf mounting or hanging. Use the included mounting clips or compatible ratchet hangers rated for the fixture weight (1 lb). Ensure the fixture is level and secure before applying power.
3. Route the power cord: Position the power cord so it clears the propagation area without creating a tripping hazard or interference with dome lids. For multi-tier setups, route cords along the rack frame and secure with cable ties.
4. Connect to power: Plug the fixture into a standard 110V grounded outlet. For timed operation — which is recommended for consistent photoperiods — connect through a 24-hour mechanical or digital timer set to your target on/off schedule before plugging in the fixture.
5. Verify operation: After powering on, confirm the LED array illuminates evenly across the full strip length. The passive cooling design means there is no fan noise to listen for — normal operation is silent.
6. Adjust height as plants develop: As seedlings emerge and grow, raise the fixture incrementally to maintain the 2–4 inch clearance above the canopy. Stems that stretch toward the light are typically a sign the fixture needs to be lowered or the photoperiod extended.

Sources & Further Reading