Lighting

Our indoor grow lighting range

At Plant and Flower, your Belgian grow shop since 2011, we stock the four horticultural lighting technologies used in indoor gardens today: HPS, MH, CMH and LED. From HPS and MH bulbs with proven yield per watt, through CMH Lumatek 315W kits for a near-sunlight ceramic spectrum, to the latest-generation LED grow lights. Each technology has its sweet spot — our job is to help you pick the right one for your space, budget and cultivation goals.

HPS, CMH or LED: making the choice

HPS lamps are the oldest of the four technologies: a Philips GreenPower 600W produces 1,100 µmol/s at 600 W with a technical service life of 14,000 hours. CMH (ceramic metal halide) bridges traditional and modern with a broader spectrum and better efficiency than HPS, attractive for growers not quite ready to commit to LED. Full-spectrum LED like the Lumatek Zeus 600W Pro posts the highest figures in our range: 1,990 µmol/s at 640 W, an efficacy of 3.1 µmol/J, fully dimmable, minimal heat output and a 60,000-hour lifespan.

PAR, PPF and efficacy: the numbers that matter

PPF is the total usable light a grow light produces, measured in µmol/s; efficacy, in µmol/J, tells you how many of those PAR photons you get per watt consumed. These are the two figures to compare across technologies, whether you are lighting a tent or a greenhouse. The values below come from the product sheets in our own catalogue.

Wattage guide by canopy area

• 60x60 cm tent: 250W HPS kit or 100-150W LED
• 80x80 cm tent: 400W HPS kit or 200-250W LED
• 100x100 cm tent: 600W HPS or a 200-250 W LED such as the Lumatek Attis ATS 200 W Pro (540 µmol/s)
• 120x120 cm tent: 600W HPS or 300-400W LED
• Larger spaces: multi-panel LED configurations or double HPS setups

Ballasts and reflectors: the accessories that matter

A high-output grow light paired with a weak ballast loses 10 to 15% of its efficiency. Our digital Lumatek ballasts feature soft-start ignition that extends bulb life, dimming from 50% to 100%, and built-in surge protection. For reflectors, the Adjust-A-Wing Avenger spreads light evenly across the canopy with no hotspots, and the Super Spreader accessory pulls heat off the centre of the beam. When heat is a real problem, a Cool Tube connected to your ventilation system pulls hot air directly out of the grow space.

Key parameters under artificial light

• Canopy PPFD: 400-600 µmol/m²/s in veg, 700-1000 in flower
• Light-to-canopy distance: 30-40 cm for LED, 40-60 cm for HPS with reflector
• Leaf surface temperature: 24-26 °C — measure directly under the lamp
• Minimum tent height: 180 cm to properly fit light + ventilation

Building out a complete grow setup

For a first grow, a complete kit is the simplest route: bulb, ballast, reflector and cables in one box, ready to plug in. Match it with an appropriate grow tent and climate control (timer, thermo-hygrometer). Belgian beginners often start with a 250W kit in an 80x80 cm tent — enough for 2 to 4 plants and easy to scale up. More experienced growers typically migrate to LED to cut electricity costs and manage summer heat loads. For propagation and germination, low-output fixtures such as the Secret Jardin Cosmorrow 40 W are enough — seedlings and cuttings need far less intensity than a flowering canopy, so a dedicated propagation light saves both power and heat.

FAQ - Frequently asked questions about grow lighting

Whether you're setting up your first 250W kit or investing in a high-end LED, we have the lighting solution matched to your space and budget. Buy grow lights online at Plant and Flower, shipped from Belgium with fast and discreet delivery across the EU.