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Roleadro LED Grow Light Bulb, 45w Plant Growing Lights Lamp Panel with Red&Blue Spectrum for Indoor Plants,Hydroponic, Greenhouse, Succulents, Flower, Seedlings Growing
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- Newest Panel Growing Light: Design with 117pcs red leds (660nm wavelength)+52pcs blue leds(450nm wavelength). Red and blue light have the best contribution on photosynthesis, effect directly of plants growth.
- Professional Spectrum Ratio: Red:Blue=2.25:1, according to growing practice, this ratio can provided more useful light to help plants grow faster, provides the most suitable light spectrum needed for plants sprout and growth.
- Rapidly Improve Growing: this led plant growing lights bulb can rapidly improve the health of plant and growing, generally more leaves will pop up with 12 days of using this growing lamp on a daily basis. It is recommended to cover an area of 7-8 square feet and be hung at around 18″–48″, depending on the cycle your plants are in.
- Lower Power Consumption and Durable to Use: Low power consumption but high luminous efficiency, use thick aluminum alloy plate to reach a better heat dissipation, won’t hurt your seeds and plants when using. Long service life up to 50,000hrs.
- Provided by professional led grow light manufacturer with rich research and sales experience. We can provided you the consistent quality that we always did. 12 months warranty and 30 days money back.
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From the manufacturer
Built to Your Harvest
❤Professional Spectrum ❤High Efficiency Chips ❤Energy Saving
1.Professional spectrum ratio: red:blue=2.25:1; the most suitable ratio for seeds and leaf growing, you can see more rows after using the lamp.
2.Wider light angle: each chips light angle can reach 90°, ensure the light more uniform for plants growing.
3.High-end concentrating cup kit silver surface temperature oil spray. Ensured better light effect.
4.Can replace 3 to 5 times the power of high pressure sodium, can save 80% of energy than traditional high pressure sodium and metal halide lamps. Higher light efficiency, 95% of light emitted can be absorbed by plants.
5.Suitable for seedlings, vegetables, flowers, view leaf plants, such as succulents, herbs, basil, orchid,rose, wheatgrass, lettuce, dendrobium, seaweed, green pepper, eggplant, bitter gourd, tomato, potato, strawberry, grape,chilli, etc.
6.Widely used for indoor gardens, greenhouses, plant factory, greenhouse farming, flower farming, water soluble breeding, pipeline cultivation, farm, potted plants, spray the plant, tissue culture and so on.
Brand Name: Roleadro
Series: Grow light panel series--HY-MD-D169-S
Red leds: 117pcs 660nm; Blue leds: 52pcs 450nm
Spectrum Ratio: 2.25:1
Actual power:25.2±5% watt
Lumen: 4546.2 Lux
Input voltage: AC 85-265v
Working Frequency: 50-60hz
Lifespan: 50000 hrs
Certificates: CE, FCC, ROHS
Advice & Tips:
1. Hanging or placing lights over the plant beds or pots is the best arrangement, as it mimics natural sunlight from overhead and exposes all sides and leaves of a plant to the artificial light.
2. Different types of plants need different amounts of light. As a general rule of thumb, most vegetables and flowering plants need 12 to 16 hours of light per day, with flowering plants at the top end of that range. Plan on giving most plants at least 8 hours of darkness per day.
3. LEDs have a lower heat signature, It is recommended to be hung at around 12''–48'', depending on the cycle your plants are in.
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Nutrient delivery is computer controlled and precisely monitored. Over the last 18 months I ran experiments in DWC hydroponics STERILE, DWC "Bennie", Aeroponics, Ebb and flow, ebb and drain, Kratky method, and full aquaponic systems.
These ROLEADRO Panels are built very well and have an external (small) ballast. The ballast gets mildly warm under continuous use 18/6hr. Mildly warm means 88-105f with an ambient temperature of 74f-88f,
The backside of the panel is flat and looks to be tin, maybe aluminum. It doesn't get hot. Surface temp probe reads 82f on the metal backside, after it had been on 18hrs straight. Out of all the LED multispectrum panels that I tested in the 60watt (or below) category, these 45w panels delivered the SECOND best PPFD Photosynthetic Photon Flux Density and overall visible growth results in all plants when placed within extremely close proximity to the plants (micro greens)
(top light tested is the Taotronics 36w bulb which even beats out most of the 1200watt LED lights ( https://www.amazon.com/TaoTronics-Hydroponics-Organic-Greenhouse-Applicable/dp/B01HPIPM70/ref=sr_1_2?ie=UTF8&qid=1492746912&sr=8-2&keywords=taotronics+grow+light )
With the Quantum par meter, these bad boys put out 200-245μm (micromoles) at 3-5". That's impressive compared to the other cheap LED panels offered on Amazon which are putting out around 9-40μm and saying they are 4x the power.
The spectrum falloff is within expected range, I would say the ideal effective range for these is very close 3" to 8" (max) for proper coverage. and subsequently limits the effective angles of usable light. You could place them higher however the PAR drops significantly after 1.5ft. Keep your expectations within scientific reasoning, don't expect to bloom 16 Costco sized strawberries off this one single panel. However you could grow TWO entire 20x10 trays of flowers on this easily. You could grow a SINGLE 20x10 of Microgreens (healthily) under this.
To provide a comparative perspective, marijuana seedlings thrive when you start seedlings with a minimum of 150µmol, preferably 300µmol+, teen (2 weeks into VEG or futher) marijuana from healthy strains are known to prefer a minimum of 500µmol+ , and recent studies by NASA and The Department of Agriculture show that marijuana thrives best at around 4000µmol, something that most (singular LED lights) LED's are not capable of for long periods of time (4/21/2017) without peltier/watercooled assistance. Most of the good LED lights kick out around 1200-2300µmol and the ones that do it continuously RELIABLY and run cool to the touch, will cost anywhere from $900-4000.
You can use the following calculation to determine the hourly PAR. Substitute your actual instantaneous PAR measurement for the '55µmol’' below:
Hourly PAR= (55µmol / m^2s) ( 60s / 1min) (60min / 1hr) (1 mol / 1 x 10^6µmol) = 0.36 mol / m^hour
In case anyone isn't tracking along, here are some definitions:
Humans use Lumens. Don't measure a lights effectiveness by it's luminosity. If you do, you're just an idiot. The FEIT 300watt LED $40 bulb is extremely bright and can light up a .25 acre backyard, it's marketed as "stadium lighting replacements" however it puts off a miserable 10µmol within 2" of the bulb and couldn't grow anything.
Plants use PAR, PAR stands for photo-synthetically active radiation (PAR). PAR is NOT a measurement or “metric” like feet, inches or kilos. Rather, it defines the type of light needed to support photosynthesis.
The three factors anyone (even little ol granny growing Magnolias indoors) should care about when growing under artificial lighting is:
PPF - Photosynthetic Photon Flux, PPF measures the total amount of PAR that is produced by a lighting system each second.
PPFD - Photosynthetic Photon Flux Density (PPFD), measures the amount of PAR that actually arrives at the plant, or as a scientist might say: “the number of photosynthetically active photons that fall on a given surface each second”.
Photon Efficiency....Photon Efficiency refers to how efficient a horticulture lighting system is at converting electrical energy into photons of PAR. Many horticulture lighting manufacturers use total electrical watts or watts per square foot as a metric to describe light intensity. However, these metrics really don’t tell you anything since watts are a measurement describing electrical input, not light output.
Micromoles (looks like this µmol ) – Intensity of a light is measured over a fixed area to understand the ability of a light to cover an area with that intensity (coverage). Micromoles of photons per square meter per second (µmol/m2/s) measures the intensity by taking measurements in a consistent 4 x 4 grid, measures the coverage of that intensity–commonly known as PPFD per 4 x 4 grid. Rather than measuring light intensity by lumens per watt with a lux meter, growers should use a quantum PAR meter to measure the micromoles of photons per square meter per second (µmol/m2/s) at the canopy level. To best calculate PAR light intensity coverage using PAR mapping 4 x 4 grids, be sure and measure at various heights. Spot readings (PPF) metrics are misleading. G rowers use PPFD per square meter to accurately measure intensity and coverage of that intensity.
If you're like "whoa dood, I'm just trying to grow baby tomatoes for grams and you're going Bill Nye on me", I'm simply saying: These panels are great for certain applications like seedlings and microgreens, it is not suitable for any large blooming or fruit applications. I hypothesize that you cannot yield marijuana under these at all (unless you're crazy), you can however start seedlings. This is also perfect for sustaining Tissue Cultures and have been very reliable. I have ordered 8 of these now and use them in the laboratory.
If you want to be MINDBLOWN......, the $26 Taotronics 36w LED grow light BULB puts out a WHOPPING multispectrum 1500µmol at 1.5ft You would need a couple per plant for large fruits, vegetables or marijuana, but you cannot beat the cost factor and....after running the lights for 24/7, you can easily fully grab the bulb/heatsink, unscrew it, and it won't even be slightly warm.
I can conclude that while soil on Mars is healthy enough to sustain Strawberries, they are absolute water monsters with low positive environment benefits (oxygen consumption vs depletion) and not ideal candidates for space colonization... I love science!
They are both good, however I slightly prefer UNIFUN for the following reasons:
* Uses carabiner style hooks to mount
* Has external power supply which is bulky and gets hot
* No power toggle switch
* Has 13x13 LED bulbs
* Runs slightly hotter than UNIFUN
* Uses threaded screws to mount
* Has internal power supply
* Has a power toggle switch
* Has 15x15 LED bulbs
* Runs slightly cooler than Roleadro