LED Grow bulbs are a great solution for anyone growing indoors since light is the most important environmental variable concerning plant growth. But what exactly should you look for in one?

Based on our personal experience with grow bulbs here at Bloomed Co, we can safely say that the SANSI LED Grow Bulbs are our favorite. Based on the spectrum, optics, and, most importantly, how they look in your living space, we believe they are a great bang for your buck.

If you’re new to the whole world of grow bulbs, let us begin by briefly explaining a few key terms.


A grow bulb’s listed spectrum refers to the electromagnetic wavelengths of light produced to promote plant growth. Photosynthetically active radiation (PAR) acts as the major driver of photosynthesis. It represents the range in the spectrum where photosynthesis is most efficient, 400nm to 700nm. In other words, this is the light that your plants love.

The ideal spectrum for indoor plants depends on several factors. We recommend a fuller spectrum option since they cover more of the pathways in which plants use light.


Again, Photosynthetically Available Radiation is light that falls into the 400nm to 700nm spectral range. The actual unit used to measure PAR is micromoles per second, μmol/s.

This unit indicates how many photons in the PAR spectral range actually fall on the plant per second, which makes it a valuable measurement.

It is measured in Photosynthetic Photon Flux (PPF) or Photosynthetic Photon Flux Density (PPFD).


Photosynthetic Photon Flux measures the total amount of Photosynthetically Available Radiation that is produced by the bulb each second. It’s essentially the total amount of photons emitted measured in micromoles per second (μmol/s).


Photosynthetic Photon Flux Density measures the amount of PAR that actually arrives at the plant. PPFD is a spot measurement of a specific location on your plant measured in micromoles per square meter per second (μmol/m2/s).


A bulb with optics provides optimal efficiency. Optics ensure the light is being directed toward your plant which increases the intensity. Without optics or a shade, light from the bulb degrades rapidly with distance.

All of our products support standard E26 based LED Grow Bulbs up to 3.5 inches in diameter.

Taking the above into consideration, we recommend the SANSI 15W LED Grow Bulb or the FEIT LED Grow Bulb. Both of these bulbs will work great in all of our pendant fixtures.

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