Illumination, required for photosynthesis.

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4
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1answer
51 views

What is Etiolation?

I saw a comment about Etiolation when talking about wintering plants. Etiolation is a big concern also, in warmer temps and short days. I've never seen that word before, it sounds like it's ...
3
votes
1answer
71 views

Does a luxmeter provide an accurate measurement of usable light?

Does a luxmeter provide an accurate measurement of usable light? What values constitute equivalents of 'shade', 'part sun/shade', 'full sun', etc?
2
votes
1answer
49 views

What is the optimal LED wattage for a single bell pepper plant?

I plan on topping it to keep the canopy wide. I am most concerned with getting an LED fixture that doesn't fully activate photosynthesis. Granted I know that wattage isn't the best way to determine ...
4
votes
1answer
68 views

What should I look for when selecting lights for indoor cacti?

We grow cacti indoors due to the weather (UK). What should we look for when selecting lights? We have had mixed results with a new lighting system and have started to lose some. See one of the old ...
3
votes
1answer
90 views

How will indirect sunlight affect indoor tomatoes under grow lights?

I'm deciding where to put my indoor vegetable garden for the winter. I will use grow lights as the primary light source but part of my decision decision is based on the value of indirect sunlight. ...
3
votes
1answer
60 views

Tropical Growth Room for Vanilla Planfolia

I live in London and am designing a growth room in my garage (1m (W) by 1m (L) by 2m (H)), for a vanilla planfolia orchid. There will be one or two, and I am wondering how many of what wattage growth ...
1
vote
1answer
33 views

How to be safely install light bulb for outdoor vegetable?

My patio does not have direct sunlight, but I want to build a hydroponic system. The vegetable that I want to plant requires a lot of light, so I also want to put lighting system outdoor for the ...
1
vote
0answers
31 views

Photometry and plant growth [closed]

What unit of photometry is used to assess plant growth? Is there a catalog that lists plants and the required light exposure? I'm looking at more detailed indicators than "a lot of light" or "not too ...
4
votes
2answers
57 views

Comparison of efficiency of different light colors / spectrums

I am building an led light for my indoor hydroponic / aeroponic / foggaponic hybrid herb garden. I am currently using a 100W warm white LED module. It works fine but I am also building another RGB ...
6
votes
2answers
259 views

Is a full spectrum 380-840nm white phosphor LED suitable for growing plants?

I am an avid grower and like most I have spent much time and money on various lights and techniques. Take a look at this ...
3
votes
2answers
87 views

Is light direction or proximity more important when considering indoor natural light for plants?

I'm trying to provide my houseplants with as much natural light as possible inside my 2nd floor apartment. I have 2 large bay windows that face north, and can put my plants directly by the window/on ...
2
votes
2answers
230 views

What would grow well under a trampoline?

We have a trampoline in our garden where the trampoline itself is made from a dark mesh material that lets through light. This means that the lawn underneath grows fine (perhaps a bit slower?). So I ...
5
votes
2answers
320 views

What are the alternatives to AeroGarden

I'm looking for an indoor hydroponic system and I've found the AeroGarden family which looks great but I'd like to check the alternatives. Are there systems similar to this? Important features for me: ...
3
votes
1answer
2k views

Glass vs plastic greenhouse covering: pros and cons

When building or buying a greenhouse, it seems to me that the material to use is one of the first concerns. The two options I'm trying to compare right now are glass and plastic films. The ...
7
votes
1answer
4k views

Are household LED bulbs suitable as supplemental light for plants?

I live at a fairly northerly latitude where we have limited hours of daylight during the winter. Low-wattage (5-8W) white LED bulbs seem to be becoming more common as a household light source. Do ...
5
votes
1answer
647 views

What is the best light spectrum for growing chili peppers?

Natural light is best for plants during all growth phases, but I'll be growing indoors, It's a good idea to have a basic understanding of the light spectrum and how it affects plant growth, in order ...
2
votes
3answers
153 views

How to soften water to water plants?

I am living in Tartu where the water is middle hard. I think that it is partially the reason why some of my plants are dying. I manage my plants by watering once a week by room temperature, 20C, ...
10
votes
3answers
6k views

How much lighting do I need for growing lettuce using indoor hydroponics?

I am beginning to get into indoor hydroponics to grow lettuce, I haven't figured out which type of lettuce to grow yet, I am thinking of a butterhead. I have been to many hydroponics stores and seen ...
3
votes
2answers
342 views

Are there sources for what plants do require which uv light levels?

Tropical plants may require a higher UV level in the light, if not to grow, maybe to fruit. Are there studies / sources on that with actual quantities? Bamboo suggested in her answer to look at this ...
4
votes
1answer
901 views

What kind of light is needed for moss and ferns?

I'm planning to set up a nano-vivarium to grow moss and ferns indoor like shown in the picture below. My question is what kind of light is best or which lamps should I use? I don't have any ...
7
votes
1answer
64 views

Does it matter when I supplement light?

So i know my plants aren't getting enough light, my question is, does it make a difference if I turn on the light as soon as the direct sunlight goes away or if I do it when I get back from work (and ...
11
votes
4answers
7k views

What can I grow in a sealed office environment with no natural light or airflow?

Can ANY plant with green foliage survive in a sealed office environment with fluoroscent lighting from 8am to 5:30pm and air conditioning set at 20 C? For the remaining time, there is basically zero ...
5
votes
1answer
203 views

Is High-Intensity Discharge (HID) lighting better overall than Compact Fluoresent Lighting (CFL)?

For hydroponic horticulture are Metal Halide (MH) and High-Pressure Sodium (HPS) lights still the staple/better choice for growing indoors or do Compact Fluoresent lights (CFL) offer enough light ...
7
votes
1answer
1k views

Do seeds require light indoors to germinate?

In general, do most seeds require/do better with bright light when germinating indoors? I am trying to germinate a variety of seeds indoors (basil, chives, spinach, pepper) and am curious if no ...
5
votes
2answers
7k views

Can plants have too much light, or do they need night/rest?

Because we live in southern Canada, in the late fall, my mother likes to take as much of her garden indoors as she can fit, for the winter. She usually brings in her potted palms, a few flowers, at ...
8
votes
1answer
387 views

Does controlling night-time light for house plants improve their health?

I keep a few dozen assorted plants under fluorescent lighting in my basement, because the light isn't very good at the windows. I have always left the light on day and night, but now that I think ...
9
votes
2answers
341 views

Is there a fruiting plant that can grow in an office environment?

In the office there is an abundance of fluorescent light and that's about it. The temperature stays around 70 ºF (21 ºC) I think. Could I grow a fruiting plant in these conditions? I may be able to ...
6
votes
1answer
95 views

What products can I use to hang herbs under a fluorescent light?

I have a window-like opening between my kitchen sink and the adjacent room. On the ceiling of the opening is a fluorescent light, and ideally I'd like to set up a long rectangular hanging basket ...
8
votes
1answer
795 views

What light cycle should I use to grow herbs indoors?

I would like to have a small container herb garden indoors this winter, but I want to make sure my herbs do not try to flower. Currently, it's a couple of different basil plants and some rosemary, ...
8
votes
2answers
2k views

What is the effect of streetlights on plants?

This may be totally off the wall, but the sunflowers growing around my garden are bigger the nearer they are to the street light. I've seen documentaries with marijuana labs in California where they ...
22
votes
4answers
4k views

Can aloe be grown indoors with artificial light?

I came across a very beautiful aloe in a shop a few days ago, which I would like to plant in my office next to my computer. However, there is no natural light (sunlight) and only fluorescent light, ...
14
votes
2answers
410 views

What kind of a grow lamp can I use in my apartment?

Can anyone recommend a style of small-sized grow lamp that I can use inside my apartment to give my plants some extra light in the evening that won't cost a lot of money to run.