LED Grow Lights

Modern LED grow lights UK have reshaped what indoor growers can achieve. Today’s quantum board and bar-style LEDs deliver 2.5–3.2 µmol/J efficiency ratings, meaning more photosynthetically active radiation (PAR) per watt than any previous technology. At The Horticulture Company, we stock a hand-picked selection of LED grow lights from the most trusted brands — Lumatek, Gavita, Sanlight, Maxibright and more — all backed by our experienced growing team.
Quantum Boards vs Bar-Style LEDs
Quantum board LEDs spread hundreds of high-efficiency diodes across a large surface area, producing an even PPFD distribution with minimal hotspots. This makes them ideal for level canopy growing in standard tent sizes. Bar-style LEDs take a different approach, with multiple supplementary bars that can be adjusted to customise the light spread above an irregular canopy. Both designs are highly effective — the right choice depends on your tent dimensions and canopy management style.
Look for LEDs with Samsung LM301B or LM301H diodes as a quality benchmark. These diodes deliver outstanding efficiency and a full-spectrum white output that closely mimics natural sunlight. Many premium LEDs now incorporate targeted deep red (660nm) and far-red (730nm) supplementation to enhance flowering response.
LED Running Costs and ROI
A 600W LED replacing a 600W HPS consumes similar wattage but generates significantly less heat. The real saving comes from reduced air conditioning costs and lower lamp replacement frequency — LED modules last 50,000+ hours versus 3,000–6,000 hours for HPS bulbs. Over a two-year period, a quality LED typically pays for itself versus an equivalent HPS setup.
We have been helping UK growers switch to LED with confidence since 2017. Our team can advise on the right wattage, coverage and hanging height for your specific tent or grow room. Browse our full LED grow light range below.