Before answering the question of whether or not full-spectrum lights are effective for growing plants indoor, let us form a quick overview of its underlying concept. Full-spectrum light, as the name itself suggests, is the natural light that contains all the wavelengths of light and is emitted by the sun. Although full spectrum light contains UV and infrared light too, plants only capitalize on a limited portion of the visible light spectrum for photosynthesis. Technically speaking, the range of light used by plants for conducting photosynthesis is known as PAR and the full-spectrum light, in concern, essentially covers the major part of this PAR range.
This is the reason why, supplying indoor plants with full-spectrum lights is not only important but, also indispensable. Like outdoor conditions, the plants that grow indoors require full-spectrum LED grow lights because these bulbs create a balance between warm and cool light thereby, replicating the natural solar spectrum. Every stage of the cultivation, starting from seeding to flowering should be exposed to full-spectrum light as it fulfills the requirement of optimal light for the crops' growth without overheating the room in which they are planted. If the plants fail to receive sufficient light, they will form incredibly long internodes or have diminutive sizes, which is obviously not a good sign.
Unlike standard fluorescent and incandescent bulbs that only provide blue and red wavelengths respectively, the best LED grow lights are meant to suffice the plants with the full-spectrum white light. While some might argue that blue and red wavelengths are necessary to facilitate photosynthesis in plants, you shouldn't forget that the oversaturation of these same lights will spoil the quality of the crops and result in their stunted growth. In contrast to this, full-spectrum light that imitates natural light triggers natural photorespiration in plants. This will inescapably force the plants to work harder (maximization of growth) but, at the same time, will ensure that the nutrients are absorbed more efficaciously. The verity that this process will make way for healthier growth, sturdier plants, and increased yields hence, goes without saying.
As evident from all the above-mentioned claims, plants growing indoors should have access to full-spectrum lights emitted by the best LED grow lights online because they provide wavelengths that constitute the main part of the PAR. When lights are said to sway towards warmer tones (red domination), the wavelengths fall between the range of 625-675 nm. These wavelengths prompt blooming in plants and resultantly, enhance the pace of their fruit production. Likewise, lights with cooler tones (blue domination) have wavelengths that fall between the window of 400 nm and 450 nm which, in turn, boost vegetative growth. Therefore, depending on the type of plant you are growing and its needs, you might have to recalculate the height of the full spectrum light and its distance from the canopy. To be precise with the lighting, we would suggest you first gauge the PAR of the plants that are being cultivated and accordingly, position the LED grow lights.