Sow in autumn, covering lightly with grit. Require a period of cold, moist stratification. Germination within 30 days at 13–18°c The tough polycarbonate housing is smooth-edged and doesn’t rust or dent. It measures approximately 24 by 5 by 1.75 inches and can be flush mounted or hung using the included 6-inch wire harness. The power cord is 5 feet long. Soak seeds for 24 hours before sowing, then surface sow as require light to germinate. Germination in 30 days at 15°c LED lights, such as the GE BR30 Grow LED Light or Aceple Desk Plant Grow Light, are one of the most popular, as well as the most efficient options. They also offer ideal light spectrum ranges. LEDs emit less heat than incandescent bulbs and can last up to 30 times longer. “LED lights are my preferred go-to for lights, because they’re energy-efficient and generate little to no heat,” Johnson says.

These benefit from predominantly blue light to promote good growth and compact plants. The T5 HO tubes should be placed around 60cm (2ft) above the seedlings for around 16 hours a day. Sow in summer, lightly covering seeds with compost. Seeds need a period of warm stratification followed by a period of cold moist stratification. Germination up to one year at 10–15°cLight quality refers to the wavelength or color of light. The light spectrum is composed of red, orange, yellow, green, blue, indigo and violet light. Sunlight provides all colors of light.

But, due to their compact size, light distribution from a single CFL is limited and typically covers only a small space. Fluorescent Tubes Direct sow in prepared soil in early spring or autumn, lightly cover seeds. Germination in up to 30 days at 16–21°c This grow light produces good results, offering plants all the light they need to flourish. It has a ‘Veg’ switch, consisting of blue and white LEDs. This helps promote plant growth, encouraging healthy germination and seedling. The ‘Bloom’ switch is for flowering and fruiting. This setting utilises red and white LEDs that help plants to flourish. The lights can be used together to meet the requirements of all stages of plant growth. Sow in autumn, lightly covering seeds. Require a period of cold moist stratification. Germination up to one year at 10–16°c Extra features include a dimmer knob which can be used to tailor the brightness according to what you’re growing. The height of the grow lamp can also be easily adjusted.Can be sown indoors in spring, or directly outdoors slightly later. Germination in 10–14 days at 16–21°c This unit is a good choice if you have limited space and need a small but effective light for your houseplants. Direct sow where they are to grow from early spring in any well-drained soil. Sow seeds thinly over the soil, lightly covering. Germination in 30 days at 10–15°c This article was updated by Sage McHugh, a lifestyle writer for The Spruce who specializes in the home and garden sector. To select the best grow lights for this roundup, reviewed our testing insights from products we've tested at home. She also considered dozens of products, carefully evaluating their size, wattage, bulb type, and overall performance.

Remember that every 1% of light lost costs you 1% of your yield, so it's important to ensure that lighting doesn't degrade too much. Sow in spring or autumn, lightly covering seeds. Can be sown direct outside, where to flower. Germination within 90 days at 13–18°c Most gardeners know the value of a set of grow lights, especially in our ever-disappointing UK climate! But the issue with many grow lights is they offer little versatility. Most grow lights consist of a large rectangular set of lights which needs to be hung at a specific distance from your plants or seedlings. Whilst it can be tempting just to assess the wattage of a particular grow lamp, it’s actually more important to be aware of its PAR output.Lightly cover the seeds. If germination is poor, cold stratify for 4 weeks. Germination in up to 30 days, at 16–18°c

Both fluorescent and LED lights offer the full spectrum lighting that plants need to thrive, but LEDs are more efficient and eco-friendly. Each and every grow light is CE marked and designed to give you complete peace of mind and great results.

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This light is also energy efficient. The LED chips are high efficiency and don’t cost a lot to run, while the integrated timer ensures this lamp won’t be on for a second more than it’s needed! This portable, three-tier stand from SunLite allows you to triple your seedling and plant capacity. And it has large casters for easy maneuverability