Hanging or positioning lights directly over plants is the best arrangement because it mimics sunlight and ensures that the entire plant receives adequate light.

Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.The energy efficiency of LEDs also means they give off far less heat than other types of grow lights (other lighting systems such as HPS constantly convert more than half of the watts they consume into infrared heat). You can purchase small boot trays from the manufacturer, or another type of drip tray, to prevent this from happening.

We loved that each of the plant pods has a note indicating the plant's eventual height (short, medium, or tall), which we found particularly helpful when figuring out where to plant them (front for smaller plants, back for the taller ones). This makes LED grow lights far cheaper to run (up to a 50% reduction in lighting watts when compared to other lighting systems) while also improving plant health and all important yields. If you grow seedlings, Johnson recommends positioning them within 2 to 3 inches of a fluorescent light source, or as close to the light as possible without touching it. We tested this bulb in a desk lamp and were able to adjust the neck of the lamp to shine on the plant. Johnson says that for germination and seedlings, you can run lights 16 to 18 hours per day until they are a few inches tall.Maybe you don’t have a free DC24 port, or even have an Apex at all yet – no worries – with the optionally available 24v power supply, the GRO can be used on any aquarium.

We found that the bulb gave off a nice, warm glow without being as glaringly bright as other options.With 5 x 5 feet of vegetative coverage, the Spider Farmer SF-4000 LED Grow Light illuminates a large area. Unlike many other grow lights on this list, you will need to replace the bulb in a few months (depending on how often it is used). When deciding which size grow light you need, think about how many plants you need to cover and where you intend to put them. Having the lights on for a sufficient number of hours is also an important factor – see the guidelines below for each set up. The 660 nanometers (nm) of red light is ideal for flowers and fruits, while 460 nm of blue light encourages photosynthesis.

Simply change between the adjustable LED night light or the main bulb at the flick of your light switch.The unit comes with two 6-inch hanging wire harnesses, a 5-foot plug-in cord, and all the necessary mounting hardware. We love how versatile this grow light is: Thanks to a wide-opening clamp, you can attach it to almost any table, chair, desk, or countertop. The Gro–light fits easily to your normal overhead light or bedside lamp and fills your baby’s room with a soft glow when you flick the light switch once.