Just aim for about 150W of CFLs in Total Per Plant to Start, and stick to relatively smaller size bulbs if you can! If you want them to screw into regular light bulb sockets, use ones with a “medium base”.

How many CFLs do I need for 2 plants?
So the answer is that for 2-3 plants, and each plant contains 1 square foot, you should need not less than 150 wattages. In terms of lumens, it's always great if you can have as much as possible as long as your space can handle the heats, up to around 10000 Lux. That is the case of CFLs. Jan 27, 2021
How many watts CFL for seedlings?
Ideally, you want 100 watts per square foot. You really can't give your plants too much CFL light. Those numbers are for the flowering stage. For the vegging stage (or for seedlings or clones), you could cut that in half. I'd shoot for around 60 watts though. Jun 11, 2020
Which CFL bulbs are best for growing?
The Best CFL Grow Light for You Apollo Horticulture 60 Watt CFL Compact Fluorescent Grow Light Bulb for Plant Growing – 6500K. Hydroponic Full Spectrum CFL Grow Light Bulb 60 Watt Bulb 5500K H60. Philips 433557 100-Watt Equivalent, Bright White (6500K) 23 Watt Spiral CFL Light Bulb, 4-Pack. More items...
Are CFL lights good for growing plants?
CFL bulbs provide the light wavelengths that plant need for growth and produce much less heat than conventional fluorescent or incandescent bulbs. Compared to sunlight, CFL bulbs produce far less light intensity, so multiple bulbs may be needed to provide enough light for healthy plant growth.
Which one is better LED or CFL?
CFL's use 25-35% less energy than traditional light bulbs, or incandescent bulbs, use. ... This means that LED bulbs are incredibly energy efficient. Additionally, CFL bulbs release almost 80% of their energy as heat, while LED bulbs emit very little to no energy as heat, which increases their efficiency even more. Jul 9, 2018
Are led better than CFL for growing?
LEDs are a bigger upfront cost than CFLs. So going the LED route will mean either growing fewer plants or shelling out more money. Also consider how much you want to pay in power. LEDs are more efficient so will have less of an impact on your utility bill for the same number of plants. Feb 19, 2020
Can seedlings get too much light?
Yes, it is true that your seedlings need lots of bright light to grow healthy and strong—but they also need a period of darkness in order to thrive. In general, seedlings should receive roughly 14 to 16 hours of light a day when situated in a south-facing window. Mar 4, 2014
How many watts do I need for seedlings?
In very general terms you need 15 watts per sq foot to grow seedlings.
Can you grow with LED and CFL together?
As far as I know, using LED and CFL together is recommended, as long as you keep the temperatures in check so your plants won't get burned. The more light, the better because no kind of lights is perfect. Sep 29, 2017
How many lumens does a CFL plant need?
10,000 lumens Each plant should be covered by around 10,000 lumens per plant or even more. So if a bulb gives off 2,500 lumens, you'd need 4 or more of those bulbs per plant for optimal light coverage. Remember, more light = plant makes more energy = more yields.
Can you flower with CFL?
Light is what gives your plant energy, and the more energy it gets, the bigger buds it will grow. It's optimal to use 'daylight' (6500k) colored bulbs for the vegetative stage and 'soft white' (2500k) colored bulbs for flowering, but you can use any color CFL during either stage and your plant will grow well.
Will 5000K LED grow plants?
Even though red and infrared are mostly left out, it's a decent growth spectrum. Go any lower to 1000K, and the blue light will drop below what is good for plants. Go higher than 5000K, and so much red light is left out from the spectrum your plants will grow slowly and without much vigor. Sep 5, 2018
Can I use normal LED light to grow plants indoor?
Yes, you can use a normal LED light to grow your indoor plants since all of the plants under this category can thrive in artificial light. However, the growth and development of your plant may not be as good as natural lighting or other artificial light sources with specific colors.
Is 6500K good for plants?
Foliage growth is generally best around 6500K, though many plants need a period of warmer light, around 3000K, in order to produce flowers, and thus fruit. In other words, if your goal is to simply produce seedlings, leafy green vegetables, or root crops, you only need higher spectrum bulbs. Mar 2, 2018
Do CFL bulbs get hot?
Incandescent and CFL bulbs get so hot because most of their energy is being released as heat, not light, making them much more ineffeicient. Proprietary tests show 100W incandescent lights burning at 335.4 F, CFL lights burning at 179.2 F and LED bulbs burning at 87.2 F.
Which is brighter LED or CFL?
LED VS CFL Brightness Are LED lights brighter than or equal to Compact Fluorescent (CFL) bulbs? The trick is to understand the technology. In short, LED and CFL as technologies do not have a difference in brightness intrinsically. Apr 9, 2020
Are LED lights bad for your eyes?
The "blue light" in LED lighting can cause damage to the eye's retina and also disturb natural sleep rhythms, according to a new report. ... "Exposure to an intense and powerful (LED) light is 'photo-toxic' and can lead to irreversible loss of retinal cells and diminished sharpness of vision," it said. May 16, 2019
Are CFL bulbs dangerous?
Compact fluorescent light bulbs (CFLs) use dramatically less energy than incandescent bulbs and reduce greenhouse gas emissions. But they also contain mercury – a dangerous toxin. Jul 31, 2007
What is the best grow light to use?
Fluorescent lights Fluorescent lights are the most popular choice for home growers. Some newer types offer a wider light spectrum for all-purpose use, but traditional fluorescent bulbs lack the appropriate range for flowering and are best suited for germination and vegetative growth. Mar 28, 2016
Which led grow lights are the best?
Top LED Grow Lights — Reviews Of The 6 Best of 2020 Best LED Grow Light Overall: HLG V2 Quantum Board Series LED Grow Lights. Best Value: Spider Farmer SF Series Of Quantum Board LED Grow Lights. Best COB: Phlizon COB Series LED Grow Lights. Highest Quality: Platinum LED Advanced Platinum Series. More items... • Jan 4, 2021
What is better for growing LED or HPS?
HPS lights use much more electricity to generate light than comparable LED grow light setups and are thus much less efficient. HPS lights also generate a lot of heat, which often requires additional ventilation equipment to maintain a proper grow room temperature.
How do I know if my seedlings are getting too much light?
If your plant is not getting enough light, the most common sign is the yellowing and dropping of leaves, stunted leaf growth, elongated stems, and a dull-green color. If your plant is getting too much light, then its leaves will have singed tips, burned patches, or will be falling off (yikes!). Jun 29, 2017
How do you know if your plant is getting too much light?
Signs your plant may be getting too much light; Brown leaf edges or tips. Brown, dry patches on the leaves. Leaves turn pale or yellow, particularly those most exposed to the light. Yellowing may be noticeable in the leaf tips first. Leaf yellowing may not affect the leaf veins initially. More items...
How close should LED light be to seedlings?
24-36 inches For seedlings, LED grow lights should generally be mounted between 24-36 inches above the plant canopy – however, this depends on the power (wattage) of the light source. Jun 25, 2020
Are LED lights good for seedlings?
LED plant lights use less energy and emit less heat than compact fluorescent lights, reducing costs and simplifying temperature control in enclosed environments. Go with full-spectrum LEDs (which don't look purple) for growing seedlings, propagating plants, and perking up houseplants in winter. Jan 17, 2019
What size LED light for 3x3 grow tent?
The smallest number of watts needed to grow cannabis in a 3x3 foot grow tent is 40 watts per plant, although the best grow lights use at least 200 watts for the whole tent.
How many watts do I need for a 4x4 grow tent?
500-600 watts For a 4×4 tent, you should have a grow light having an actual wattage range of 500-600 watts (assuming flowering plants which require a lot of light and are congregated in a single area. Vegetative growth for high-light plants need about half this wattage). Jan 9, 2021
Is a regular light bulb good for plants?
Generally, yes. But because LED technology is so customizable, every bulb is different and you want bulbs that produce the exact mix of red, blue and other wavelengths preferred by your plants. White light contains a great mix for plants, so white LED bulbs will work to grow.
What are the best lights for growing indoors?
Fluorescent lights are ideal for plants with low to medium light requirements, like African violets. They are also good for starting vegetables indoors. These lights typically come in long, tubelike bulbs in a range of sizes including T5, T8 and T12.
Can LED grow lights burn plants?
The reality is that modern LED grow lights can produce a very high level of light and it can cause photo-bleaching and burn leaves. This depends very much on the plant, but a PPFD of 800 is enough to damage some plants.
What is the best Kelvin for vegetative growth?
2,700 Kelvin Plants undergo vegetative growth during daylight hours, so this light is beneficial to plants during the vegetative stage of growth. Bulbs that are ~2,700 Kelvin are beneficial to plants in the flowering and fruiting stages of growth. This is the color temperature during sunrise hours of the day.
What color light is best for flowering?
red light In general, blue light spectrums encourage vegetative and structural growth and red light promotes flowering, fruit, leaf growth, and stem elongation. Apr 29, 2020
What color temperature is best for vegetative growth?
As a general recommendation, choose a full spectrum grow light with a color temperature in the blue range (5,000 - 7,000K) to promote vegetative growth and choose a color temperature in the red range (3,500 - 4,500K) to promote fruiting and flowering. Visible Light Spectrum. Wavelengths in nm. Apr 12, 2018
Can you flower with 6500k?
Well-Known Member. Magik, everyone is right mixed spectrum is better, but to answer you question, yes you can use 6500k to flower, its not the spectrum that causes flowering, it's hours of light. Red is better for flowering but not necessary.
Can smart bulbs be used as grow lights?
Since smart bulbs can emit red light, can you use them for your plants? A lot of 'off the shelf' smart bulbs are not ideal for plant growth, but some smart bulbs – and other types of LED bulbs – can be used successfully for this purpose. Philips actually runs an indoor plant farm in the Netherlands, using LED bulbs. Jun 5, 2020
Is 2700K good for plants?
Most plants will grow better around the 6500k spectrum, while flowering plants will grow better in the 2700k spectrum.
Is 5000 lumens enough for plants?
In order to obtain optimal plant growth, the minimum lumens for a grow light should be 2000. ... Obviously in terms of grow lights more is better. Generally you want to be within the 3000 to 5000 range to get good plant growth while maintaining cost efficiency. That doesn't mean you can't go more or less than that range.
How many lumens do you need to grow plants?
There may be no ideal amount, but, generally, if you can produce somewhere between 300 and 800 lumens per square foot your plants should prosper quite nicely.
Is 5000K LED Full Spectrum?
"Full spectrum" lights usually meet this standard. Any electric light bulb with a "color temperature" of 5000K or higher also meets this standard. Above find a list of bulbs offered by us with a color temperature of 5000K or higher and light bulbs labeled by the manufacturer as "full spectrum". Aug 29, 2011
Can LED help plants grow?
Offering low energy usage, low heat, and color optimized for growth, LED lights are the most efficient, effective, and customer-friendly way to grow plants at home than growing with fluorescent lights or incandescent lights. An LED grow light array.
Do LED lights attract bugs?
Because different types of bugs see different wavelengths, it is never guaranteed that an LED light won't attract them. ... LED lights produce little to no UV light and a minuscule amount heat, which makes them less attractive to bugs—so long as they emit longer wavelengths of light. May 19, 2016
Is 6500K full spectrum?
Full spectrum bulbs give off both visible and invisible wavelengths of light. Full spectrum lights usually offer a color temperature of 6500K and a CRI of 96%- giving you a brighter, whiter light that also displays colors accurately. Jan 29, 2019
Is 6500K good for eyes?
6500K – 100% You see that blue light is even more than all other colors and this is the first reason that this value is bad for your sleep and for your eyes. We will just use this measurement as comparission to other values and as how normal displays emmit colors.
Can I use grow light at night?
In general, it's recommended that turning off the grow light at night. You should not leave grow lights on 24/7. Plants need a light-dark cycle to develop properly. ... Check your plant guides for the specific sunlight needs of your hydroponic plants as they grow and bloom. Aug 2, 2020
Can CFL bulbs start a fire?
That means track lighting, recessed lighting and any fixture that encloses the CFL bulb is not safe to have a CFL bulb in. ... CFLs could “puff” smoke or could “explode and cause a fire” if used in a fixture that doesn't allow for air circulation around the base, Smale said. Oct 12, 2012
How do I know if my CFL bulb is bad?
How to Tell If a Fluorescent Tube Is Bad? Check the ends of the tube. If they appear darkened this indicates the bulb is burned out. Rotate the tube in the fixture if the bulb is not darkened on either end. Remove the bulb from the fixture if the bulb is still not illuminating.
Do they still make CFL bulbs?
Now CFLs, or compact fluorescent lamps, are slowly disappearing from stores. Home retailer IKEA stopped selling them in all its locations last year, and now manufacturer GE has penned a cheeky Dear John letter to the technology, saying it will stop making the bulbs in the United States. Feb 16, 2016
Do you really save money with LED lights?
The most popular light bulbs available are halogen incandescents, compact fluorescent lamps (CFLs), and light-emitting diodes (LEDs). Although they can initially cost more than traditional incandescent bulbs, during their lifetime they save you money, because they use less energy.
What is a 20W CFL equivalent to?
The higher the wattage, the higher the running cost. The light output from a 20W CFL isn't the same as that from a 20W incandescent. Rather, a 20W CFL would be the equivalent of a 100W incandescent (roughly 20%).
What is 40 watt LED equivalent to?
Compare wattage Traditional bulb1 Halogen2 LED 25 watts 15 watts 2 watts 40 watts 25 watts 5 watts 60 watts 40 watts 7 watts 75 watts 45 watts 9 watts 1 more row
Can LED lights give you cancer?
The 'blue light' emitted by LED light bulbs has been linked to breast and prostate cancer, according to a new study. Both breast and prostate cancers are hormone-related. ... Apr 29, 2018
Which LED light is best for eyes?
Choose LED bulbs between 5000-6500 Kelvin color temperature and you will get close to natural colors and all details will look sharp. At this daylight color temperature, your eyes won`t get tired and you can work efficiently.
How do you protect your eyes from LED lights?
Use Computer glasses or Anti-reflective lenses Computer glasses with yellow-tinted lenses that block blue light can help ease computer digital eye strain by increasing contrast. Anti-reflective lenses reduce glare and increase contrast and also block blue light from the sun and digital devices. Oct 31, 2017
Can a broken CFL kill you?
No, the amount of vapour exposure will not kill you, in 10 years. CFL bulbs have been around for about 30 years, Long fluorescent bulbs have been around for at least 90 or so. No one has been identified as having died , as a result of exposure to these tubes.
Why CFL is banned?
Like all fluorescent lamps, CFLs contain toxic mercury which complicates their disposal. In many countries, governments have banned the disposal of CFLs together with regular garbage. ... CFLs radiate a spectral power distribution that is different from that of incandescent lamps.
Do CFL light bulbs cause cancer?
Doctors at Stony Brook University in New York found that CFL bulbs produce significant levels of UVA and UVC emissions, which are harmful to human skin. This ultraviolet radiation can cause skin to age and burn and ultimately lead to skin cancer. ... This radiation results in skin cell damage. Jul 29, 2017
Can you leave grow lights on 24 hours a day?
It is not recommended to leave your grow light running for 24 hours straight. Twenty four hours of light can prevent a plant from effectively carrying out the respiration process. If your plant is not responding to 12 or 18 hours of light, you may need a stronger grow light or you may need to feed your plant nutrients.