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DIY - Gardening Do It Yourself Do you know a good gardening DIY plan? Are you in need for some good DIY ideas? This is the forum to discuss all Do It Yourself plans and questions. For example, learn about: The pipe work to support banana bunches, making pots out of newspaper, using plastic cups as pots, tips for building coverings for plants during winter, etc. If you know a good DIY plan, please share it here, and if you need one, please ask away!


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Old 12-18-2021, 02:47 PM   #1 (permalink)
 
Location: IL
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Default My New Supplemental Lighting for Greenhouse

Since I wanted spotlights that don't block much daylight and operate safely in a wet environment, I thought it would be a good idea to use ones that are mass produced for cars. So, I bought this:

https://www.amazon.com/dp/B07FR38763...ml_rv0_dp?th=1

One problem, though. "30W" is actually 7 watts because Chinese manufacturers often lie about the wattages of their lights and Amazon reviewers are too dumb to measure the wattage like I did. Anyway, I used them:







The lights are mounted on a wooden board that I normally temporarily put up to brace the polycarbonate sheets for the weight of accumulated snow. You don't see more of these braces because it hasn't snowed, yet. Ha, ha. The lights are connected to a 24VDC power supply that is connected to a photocell that is connected to a timer that is connected to a 120VAC outlet. The photocell turns the lights off when daylight is bright. The timer turns on to mimic the period of light (16 hrs.) during summer solstice where I live.

Last edited by aruzinsky : 12-18-2021 at 03:11 PM.
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Old 01-06-2022, 08:35 AM   #2 (permalink)
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Smile Re: My New Supplemental Lighting for Greenhouse

Quote:
Originally Posted by aruzinsky View Post
Since I wanted spotlights that don't block much daylight and operate safely in a wet environment, I thought it would be a good idea to use ones that are mass produced for cars. So, I bought this:

https://www.amazon.com/dp/B07FR38763...ml_rv0_dp?th=1

One problem, though. "30W" is actually 7 watts because Chinese manufacturers often lie about the wattages of their lights and Amazon reviewers are too dumb to measure the wattage like I did. Anyway, I used them:







The lights are mounted on a wooden board that I normally temporarily put up to brace the polycarbonate sheets for the weight of accumulated snow. You don't see more of these braces because it hasn't snowed, yet. Ha, ha. The lights are connected to a 24VDC power supply that is connected to a photocell that is connected to a timer that is connected to a 120VAC outlet. The photocell turns the lights off when daylight is bright. The timer turns on to mimic the period of light (16 hrs.) during summer solstice where I live.
Decent set up tucked out of the way in the rafters.
Another forum member Nealnik was using an off-road light bar as a supplemental light for his indoor grow.
If the do not work out you can always install them on the Buick and go mudding.

I see you have holes in the cross beam supports for some additional inexpensive LED drop pendants in you wish.

With LED's one has to understand the fine print concerning equivalent watt output vs watts used, I too have been confused before.


I noticed the ventilation is using double box fans to circulate the air. Does one push and the other pull the air in the summer months?

Looks a bit nippy up there today.
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Last edited by cincinnana : 01-06-2022 at 09:00 AM.
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Old 01-06-2022, 09:56 AM   #3 (permalink)
 
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Default Re: My New Supplemental Lighting for Greenhouse

Quote:
Originally Posted by cincinnana View Post
.
..
With LED's one has to understand the fine print concerning equivalent watt output vs watts used, I too have been confused before.

I noticed the ventilation is using double box fans to circulate the air. Does one push and the other pull the air in the summer months?

Looks a bit nippy up there today.
That's not "equivalent watts." Maybe, they are using underpowered 5 watt LEDs because 6*5 = 30. I ordered more lighting to install.

Yes, the bottom fan blows out and the upper one blows in.

The outdoor temperature now is 7 deg. F. but it is 75 inside the greenhouse. I have a sensor inside the greenhouse that sends a radio signal to a thermometer hung on the wall next to me as I write this. You would think that the manufacturer would include an audible alarm to indicate when temperature limits were breached but, NO, they included a clock, instead. And I can't set the clock because none of the buttons work.
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Old 03-11-2022, 03:04 PM   #4 (permalink)
 
Location: IL
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Default Re: My New Supplemental Lighting for Greenhouse

Update:

I added three of these:

https://www.homedepot.com/p/Cree-120...oduct-overview

The 25 deg. beam angle is perfect. Too bad that narrow beam spotlights are rare. The optics are expensive to manufacture.

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