Lumatek Full Spectrum Bar LED Grow Light 100W - Efficient Supplemental Coverage
Best for: growers wanting to add extra full-spectrum light to a canopy edge, inter-canopy space or vertical rack without stepping up to a full main fixture.
Our thoughts
A slim, waterproof LED bar is a genuinely useful tool for filling in the gaps a single overhead fixture leaves, whether that's the edges of a tent or between shelves in a vertical rack. This one's built to Lumatek's usual standard rather than being a bargain-bin strip light.
The Lumatek Full Spectrum Bar LED Grow Light 100W is a slim, waterproof LED fixture built for supplemental or inter-canopy lighting rather than as a room's sole light source. It measures 1148 x 20 x 53mm and draws 102W, delivering a PPF of around 295 µmol/s at an efficacy of up to 2.9 µmol/J, using Osram and Lumileds diodes across a full spectrum. Each bar has an effective growing footprint of roughly 120cm x 25cm with a 120° beam spread.
It's rated IP65 for waterproof, humid-environment use, carries a lifespan of over 60,000 hours, and cools passively without a fan, which matters if you're mounting it inside a tent where fan noise or airflow disruption is unwelcome. It's dimmable via a 0-10V signal and weighs just 1.1kg, so multiple bars can be mounted along a vertical rack or tent edge without adding much weight to the structure.
How it compares
Slim LED bars for supplemental and inter-canopy lighting are a growing category with a few established players.
- Horticulture Lighting Group (HLG) offer similar-format bar fixtures for inter-canopy use, generally at a comparable or higher price point depending on spec.
- Growers Choice supplemental bars cover similar ground but vary in waterproofing rating and diode quality, worth checking IP rating specifically if buying for a humid tent.
- Generic unbranded LED strip lights are cheaper but typically lack the IP65 waterproofing, passive cooling design and 60,000+ hour lifespan this bar offers.
For a waterproof, passively-cooled bar from an established grow lighting brand, this sits at a sensible mid-range price for the spec.
Usage guidance
This is designed as an add-on light rather than a standalone fixture.
Positioning
Mount along tent edges, between vertical rack shelves, or anywhere your main fixture leaves gaps in coverage, angled toward the canopy rather than straight down only.
Dimming
Connect to a 0-10V dimmer or compatible controller to adjust output rather than running it fixed at full power.
Multiple bars
Several bars can be run together across a wider footprint or stacked vertically in a rack system, each drawing its own 102W.
Mounting
At 1.1kg and passively cooled, it can be fixed with basic brackets without needing heavy-duty support or ventilation clearance for a fan.
Technical specifications
- Input power: 102W (+/-2%)
- PPF: Approx. 295 µmol/s
- Efficacy: Up to 2.9 µmol/J
- Dimensions: 1148 x 20 x 53mm
- Weight: 1.1kg
- Effective footprint: Approx. 120cm x 25cm
- Beam angle: 120°
- Diodes: Osram and Lumileds
- Waterproof rating: IP65
- Rated lifespan: 60,000+ hours
- Cooling: Passive (fanless)
- Dimming: 0-10V compatible
Who this is for
- Growers filling gaps left by a single overhead main fixture
- Vertical rack growers needing slim, lightweight lighting between shelves
- Anyone wanting waterproof, fanless supplemental lighting for a humid tent
- Growers already running Lumatek fixtures who want a matching supplemental bar
Our take
This does a specific job well: filling in coverage gaps with an efficient, waterproof, silent bar that'll run for years without a fan to fail. It's not trying to be your main light, and it doesn't need to be.
Proper kit at a price that makes sense for growers wanting to round out their lighting rather than replace it.
