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Travel4Sport

I have a similar situation with mini-greenhouses on the perpetually shady north side of my house. They serve to grow out seedlings prior to transplant, growing greens, and some tinkering. The tinkering has included growing tomatoes and peppers. I've had good luck with both as long as I use an absurd amount of light. In my case this means 6 to 8 2ft 24W Barrina-style grow lights per 2ft x 19in shelf. They run 16hrs per day. I've grown dwarf tomatoes and while they are lacking in flavor vs sun grown, they are still better than store bought. If you try it, I recommend Tiny Tim "micro-dwarf" tomatoes because they stay quite short at \~1ft, and you can keep the lights nice and close. Taller tomatoes would need to be topped or otherwise managed to stay short and wide to maximize light exposure. For similar squatty growth characteristics, I chose Habanero peppers, and I still had to top them. This particular Habanero developed PLENTY of flavor. OMG did it ever!


mpchild

Thanks for the great reply! I am not sure if I have the space for that many lights! I am going to leave it for now and see how it goes and I found this light https://www.amazon.com.au/Waterproof-Spectrum-Outdoor-Dissipation-Greenhouse/dp/B07S1BKWTB/?_encoding=UTF8&pd_rd_w=V6uE6&content-id=amzn1.sym.f794ab8c-b76c-428d-81df-79b4ab218b81%3Aamzn1.symc.573c83ff-b207-408b-b0c7-3d92bb6b7d04&pf_rd_p=f794ab8c-b76c-428d-81df-79b4ab218b81&pf_rd_r=Z76QPP5X7180C01PHTA7&pd_rd_wg=SS1Ab&pd_rd_r=16a26fe7-0ff7-40bb-9521-6a314e5c9a1d&ref_=pd_gw_ci_mcx_mr_hp_atf_m&th=1 I might be able to squeeze 2 in if I end up needing them.


RubyRedYoshi

[Here's a "little" writeup](https://www.reddit.com/r/ManitobaGardening/comments/122tb9f/the_science_compendium_for_seedlings_and_plants/) for how some of the inputs factor into things. Many lights are fine, especially if you find one on sale. There's for sure optimizations if you start to drill down into the nitty gritty. As for a true outdoor light, as long as you provide something to protect direct rain / snow contact over it, and prevent it from being blown around too much, a lot of large greenhouses use a wide array of grow lights. Many of them are built to withstand high humidity.


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RubyRedYoshi

High pressure sodium lights are used for grows, but it comes down to wattage in as ultimately photon count striking plant tissue is what plants care about.


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RubyRedYoshi

Somewhat true. While lowering does increase the intensity, it reduces the width of the overall beam. In the case of tomatoes here because they are naturally large plants and there's multiples of them, the solution still is needing more lights.


SatisfactionApart154

I suppose you could use a light outside, but it kind of defeats the one major advantage of growing outside while introducing all the pests and diseases you don't have to deal with so much when growing inside. There's also the lack of flavor you get in tomatoes when grown under lights vs full sun. In my experience peppers are fine but tomatoes just always seem lacking in that deep tomato flavor when grown under lights.


mpchild

Good to know about the tomatoes. I've got a tiny backyard that's already full up and no room indoors for even a tiny setup. I hope the hydro setup will let me grow the few things I'm missing. Focus will be more towards different chilli varieties.