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03-03-2017, 12:51 PM	#48 (permalink)
aruzinsky Location: IL Find me on the map! Zone: 6a (10 miles east of 5b) Name: Steve Join Date: Feb 2017 Posts: 499 BananaBucks : 202,670 Feedback: 0 / 0% Said "Thanks" 15 Times Was Thanked 791 Times in 317 Posts Said "Welcome to Bananas" 5 Times	Re: Grow light recommendations? Getting back to objectivity, there exist direct LED replacements for T5 fluorescent tubes. Although I would never use them because they are unnecessarily costly, some have been empirically proven to grow lettuce better than fluorescent at a lower wattage in this video: https://www.youtube.com/watch?v=5KcJf1Tbmbg

Notice in the video that the LED T5 tube is visually less blue than the fluorescent.

This is the Spectral Power Density (SPD) of the LED tube in the video:

which was from this PDF: https://www.transcendlighting.com/up...rview_spec.pdf

The SPD of the Transcend LED tube is not very different than that for a 2700 K A19 LED bulb. Two 14 watt A19 bulbs can be bought for $2 whereas I don't know what the Transcend tube costs because sellers are sold out:
https://uedata.amazon.com/LED-High-O.../dp/B01BEBJQ30

Anyway, there is a glut of other brands available.

Last edited by aruzinsky : 03-03-2017 at 12:53 PM.