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3 Types of Grow Lights for Seed Starting

Whenever I talk about grow lights, I always get a sideways glance, a suspicious look, or a playful joke – trust me, if I was growing “smelly tomatoes” I definitely wouldn’t be talking about it! 😂

There was a time where grow lights were only used in dank-smelling basements & illicit indoor grow ops, but times have changed!

People want to grow indoors for a number of reasons:

  • Starting seeds
  • Growing plants & food through the winter months
  • Vertical growing

And in order to grow indoors, you’re going to need some light! The 3 most popular types of lights that growers use include:

Fluorescent

Fluorescent lighting used to be the most abundant light source around us (probably still is in some offices!), but most light has been switched to LED due to efficiency, lifespan, and economics.

Your best bet is to go with a High Output T5 light – that will give you the strongest light that you can get from a fluorescent & should be enough to get your seeds rocking & rolling! Here’s how my tomatoes & peppers did under the T5 last year.

These are great lights for seed starting & I also use mine for my abundance of succulents that I have planted in Root Pouches – stop by the shop if you want to help me clear some out 😊 or let me know if you see one in the picture below you like & I’ll get it listed!

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HPS (High Pressure Sodium)

I have no experience growing under HPS lights, but almost every grower that I have worked with over the past 5 years that uses grow lights, uses HPS. And when I say grower, I mean vegetable, annual, perennial, trees, shrubs, not cannabis.

These lights were the industry standard for a long time, but there’s another benefit that is overlooked – the heat they emit. Growers in warmer states may not want this, but this is a huge benefit to northern growers like Ohio, Michigan, or Minnesota. LEDs may save you money on energy costs, but how much more do you have to pay for supplemental heat?

This is why there is no one-size-fits-all solution for lighting. As with everything in life – it depends on a lot of factors.

LED (Light Emitting Diode)

LED lighting seems like it is on a whole other level than other lights. There are about 8 million different configurations of LED grow lights out there ranging from a $20 panel on Amazon to a $2000 set-up from a more sophisticated manufacturer. I don’t have experience with the high-end lights, but here’s what a few of those cheap LEDs did for my Habanero seedlings last year.

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LEDs have a ton of benefits:

  • Uses up to 50% less energy compared to HPS or Fluorescent
  • Can incorporate a wide light spectrum that includes Far-red, Green, and Blue
  • Ability to dial in a “light recipe” – some lights let you select amounts of Red, Blue, etc
  • Don’t give off high amounts of heat like HPS – won’t burn plants
  • Can provide disease suppression

Because there are so many options out there, I decided to go with the TotalGrow Broad Spectrum LED bulbs. The initial cost is higher than fluorescent lights, but the energy usage is 24W versus 11W – plus I’ll get a higher quality of light from the LED & my plants will grow exceptionally well!

Fluorescent lights have an inefficient & less powerful spectrum that causes plants to stretch out a little, but that should be completely mitigated with this new light set up – I can’t wait to see the power of Full Spectrum lighting!

Full Spectrum

What does Full Spectrum mean? Different colored light has differing effects on plants. See the chart below from TotalGrow to see what the Broad Spectrum LEDs do for your plants.

TotalGrow Broad Spectrum LED specs
Credit: Totalgrowlight.com TotalGrow Broad Spectrum LED Light Recipe

I’ll also be posting updates throughout the growing cycle – from Seed Starting to Supplying our customers with their CSA Veggie Box – so stay tuned to see how these lights perform from Seed to Sale!

As always, feel free to comment any questions, concerns, or drop some knowledge on me with anything I’ve missed!

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