Semi-tech --light spectrum for tomatoes

Greatgardens · December 12, 2015

I've used mostly the original Gro-lux (not WS) over the years and I've had generally good success raising seedlings until I can move them to the cold frame. But I'm always looking to improve... (It's like searching for that elusive "perfect" tomato!) Right now, I use four 40-watt tubes on my starting shelf which is apx. 12" X 40".

Looking through the info on the internet about grow-lights, it looks to me like the combination of my Gro-lux + cool white fluorescent would be better than Gro-lux alone. Or a combination of original Gro-lux + wide spectrum.Or using a combination of ~2700k to 3000k + 6500k would also be a good option.

That would be (I think) cool white + Daylight or warm white + daylight.

Any thoughts on this would be appreciated. And this has probably come up before, so any links would be great, also.

-GG

December 12, 2015	#1
Greatgardens Tomatovillian™ Join Date: Feb 2010 Location: Indiana Posts: 1,124	Semi-tech --light spectrum for tomatoes I've used mostly the original Gro-lux (not WS) over the years and I've had generally good success raising seedlings until I can move them to the cold frame. But I'm always looking to improve... (It's like searching for that elusive "perfect" tomato!) Right now, I use four 40-watt tubes on my starting shelf which is apx. 12" X 40". Looking through the info on the internet about grow-lights, it looks to me like the combination of my Gro-lux + cool white fluorescent would be better than Gro-lux alone. Or a combination of original Gro-lux + wide spectrum.Or using a combination of ~2700k to 3000k + 6500k would also be a good option. That would be (I think) cool white + Daylight or warm white + daylight. Any thoughts on this would be appreciated. And this has probably come up before, so any links would be great, also. -GG