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You are viewing a single post made by dellac in the thread called Extending growing season under lights.
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Mar 16, 2013 2:19 AM CST
Name: della
hobart, tasmania
Celebrating Gardening: 2015 Photo Contest Winner: 2015
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This is great information.

So far, I've learned what K values are, and I had no idea previously! It makes sense though now, speaking of colour temperature. More like, well, colour theory I guess, in artistic applications. Hot and cold colours etc.... except that higher values (blue) are 'hot' and lower (red), 'cold'. *runs in circles* (it's ok - makes sense in radiation terms ;) )

Now, I'm going for something like 'super daylight'? Something around the 6000-6500k mark. If that's brighter than midday sun, how do tender little babies handle it? The midday sun here is a killer. We have no ozone :D

And I've learned that the whole 't' thing isn't a measure of anything, but a designation of a type of electrical fitting. The existing fitting in the fridge is t110. Glad to know it's not wise to use them, as the only t110 type bulbs I found were for things like forklifts and diggers :D

Indeed, it's the rapidly fading daylight hours that have me worried! Almost 3 minutes less per day. That adds up. Then if we get early frosts... >>

I like the idea of making the inside as reflective as possible - mirror disco for lilies! - I don't want to stretch the seedlings. What I had in mind was supplementing the natural daylight hours. Aiming for 16 hours? I could set it up with a timer to come on before sunrise, but switch off after the sun has gotten up. Or come on in the afternoon maybe and stretch into the evening?

Don't want it to become a botrytis haven. There is some ventilation; I wondered if I might need more. I also imagined I would have the lid open during the day. Now I'm concerned - that would have fittings exposed to weather, and might be a bad thing. But then if I put it under cover, I'd lose the best natural daylight that is still left and have to have lights on/lid closed for the entire cycle.

I've found this online: http://www.ebay.com.au/itm/T5-...

Maybe I really don't need lights... maybe just sheltering long enough to get seddlings up to two leaves. But as I don't already have stacks invested in a set up, I'm happy to experiment. Even maybe give LEDs a go. Don't know what the spectrum breakdown is for this one though.

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