Build your own CEL grow light

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By: Richard Tyler Greene Jr.

www.growcel.com RTG Design

note: download full guide with diagrams and pictures from www.growcel.com click info then click download build guide.

The purpose of a grow light is to turn electricity into electromagnetic radiation in the form of light needed for plant growth efficiently as possible. Common lighting devices (including other LED lights) emit a wide range of radiation, including heat, often not needed for the intended purpose, illumination; and this energy is often pulsed at a high rate so it appears to be consistently on to the human eye but causing a drop in needed luminance at a specific wavelength and over a finite amount of time and space in relation to power consumption. Furthermore the heat generated is often removed by a fan or other method leading to more power use and heat generation.

Cool and efficient light providing consistent, constant, controlled, wavelength specific and directional illumination. The cool efficient light (CEL for short) emits the wanted wavelengths (colors) of light directionally while dissipating the heat through the reflector. The light output can be smooth and not pulsed leading to a higher ratio of light over time. Choosing the right emitters (LEDs) for the intended use it is possible to transmit wanted wavelengths (colors) of light in the wanted place with minimal extra radiation such as heat or UV rays.

Ready To Grow Cool Efficient Light (RTG CEL) by Richard Tyler Greene Jr is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.

WARNING PLEASE READ
Use at own risk.
Do not stare directly into the light.

How to build and use RTG CEL

There are three main components to RTG CEL.

1. Wavelength Specific Emitter. This device will emit a specific color of light when a specific amount of electrical energy is applied. Often but not limited to LED. The idea is to only emit the wavelengths or colors of light that you need. LEDs are good for this because they usually have a very finite and specific color range per emitter. Keep in mind choosing the proper spectrum or color of light is very important for maximum efficiency. (shown in diagram as A)

2. Load Limiting Device. You can't just hook up any emitter to any source of electricity. Without a device to control the electrical current the emitter would draw too much power and burn up. In order to find the right kind of load limiter we will need to look at the electrical characteristics of the emitters and the type of electricity. There are many options to control the electricity such as LED drivers and other digital devices but the smoothest and simplest way to drive any LED is with a properly rated resistor. For instance if we are using a 12 volt direct current electrical system and a 10 watt deep red LED that has characteristics of 10.5 volts at .7 amp then we would need a 10 watt 2.2 ohm resistor in between the power source and LED to ensure proper function. (shown in diagram as D) Here is a link to an awesome calculator! http://led.linear1.org/led.wiz

3. Heat sink/Reflector. This is the key to RTG CEL! All electrical devices give off heat as a by product to their function. Using a reflective and thermally conductive materiel such as aluminum to dissipate the heat while concentrating the beam of light will further increase efficiency and give structure to the CEL. (shown in diagram as B)

simple mechanical diagram

simple electrical hookup

"As we enjoy great Advantages from the Inventions of others we should be glad of an Opportunity to serve others by any Invention of ours, and this we should do freely and generously." Ben Franklin

CEL BUILD GUIDE
The build process for one CEL and three CEL is nearly identical thanks to the modular and open frame design. Most of the parts are common and can be found at your local electronics supply and hardware store. Following instructions and choosing high quality components will insure a successful build.

ONE CEL PARTS LIST

HARDWARE

1 18” X 7” .038 ALUMINUM SHEET

3 18” X 1 – 3/4” 1/8” ALUMINUM BAR

100 #8 X 3/4” SELF TAPPING SHEET METAL SCREW

8 #10 X 1” SELF TAPPING HEX HEAD WITH NEOPRENE WASHER

12 #8 X 33 X 2” MACHINE SCREWS, WASHERS AND NUTS

ELECTRONICS

4 RED CREE XR7090 LED OR EQUIVALENT

2 BLUE CREE XR7090 LED OR EQUIVALENT

1 DEEP RED LZ4 10 WATT LED OR EQUIVALENT

1 WATERPROOF 12 VOLT LED POWER SUPPLY

1 10 WATT 2.2 OHM CERAMIC WIREWOUND RESISTOR

1 10 WATT 15 OHM CERAMIC WIREWOUND RESISTOR

1 10 WATT 10 OHM CERAMIC WIREWOUND RESISTOR

1 3 PRONG MALE EDISON PLUG

1 FUSE HOLDER AND 1 AMP FUSE

1 25' SPOOL OF 14 AWG STRANDED WIRE

1 TUBE OF AR TIC SILVER THERMAL COMPOUND

TOOLS NEEDED FOR ASSEMBLY

DRILL 1/8”, 1/4” BITS

SCREWDRIVERS

IMPACT DRIVER WITH PHILLIPS, AND HEXAGONAL BITS (can use drill with clutch)

HACK SAW

MEASURING TAPE

FELT TIP PEN

SOLDERING IRON AND SOLDER (30 WATT OR 45 WATT)

CLEAN WORK AREA AND CLAMPS FOR HOLDING MATERIEL IN PLACE

ASSEMBLY INSTRUCTIONS

WARNING: ASSEMBLY IS DANGEROUS BY NATURE. ATTEMPT AT OWN RISK.

DO NO ATTEMPT IF NOT PROPERLY TRAINED OR AUTHORIZED.

1. Start by studying the plans and visualizing the layout of your entire area as a whole. Then gather the parts and clean the work area. Layout the pieces and have the diagrams and pictures ready during the build. Good lighting is also critical.

2. Next mark out the placement of the 1/8” holes with the measuring tape and felt tip pen on the 1/8” bar according to the diagram.

3. Then line up the 1/8” bar with the .032” sheet and clamp it together.

4. Mark the holes onto the sheet.

5. Drill through the marks with 1/4” bit.

6. Match pieces together and find best fit. Re drill any holes that don't line up.

7. Run two thin beads of thermal compound across mating surfaces (this should take up about half the tube.)

8. Screw sheet and bar together with impact driver compressing thermal compound in between. The connection should be very tight allowing no gap.

9. Preset hex head self tapping screws with neoprene washer into LED mounting holes.

10. Place thermal compound on LEDs and mount them to the aluminum surface using the screw and neoprene washer to hold LED in place. See picture for LED mounting pattern. (red – red – blue – deep red – blue – red - red)

11. Mark and drill 3 1/4” holes on center of heat sink reflector being careful to avoid drill thru or near LEDs. These holes will hold the resistor pack to the heatsink reflector.

12. Mark and drill remaining two pieces of aluminum 1/8” bar to match heat sink reflector holes drilled in step 11.

13. Mark and drill additional 1/4” holes in 1/8” bars every inch.

14. Attach #8 X 32 2” hardware through holes drilled in step # 13.

15. Place thermal compound on sides of resistors and put them on 1/8” bar between bolts. See picture below.

16. Place last 1/8” bar over resistors and thread nuts over assembly. Be careful not to over tighten.

17. Attach resistor pack to back of heatsink / reflector through holes drilled in step #11 using #8 X 32 2” hardware. Use at least 3 nuts to space 1/8” bar off screw Heads.

18. Solder fuse holder onto positive (black, brown, or red wire) of edison plug.

19. Solder the other end of the fuse holder onto the positive input wire on the power supply.

20. Solder the negative (white or blue) wire from the plug onto the negative input side of the power supply.

21. Solder the ground (green) to the chassis (using solder on eye is the best way)

22. Solder 3 12” 14 awg lead wires onto the positive output side of the power supply and attach them to the a positive side of each LED color system.

23. Solder three 6” 14 awg lead wires onto the negative output side of the power supply and attach them to each resistor.

24. Attach each resistor to the negative side of each string of LEDs and chain each color system together. Following wiring diagram!

From power supply output + +Red- +Red- +Red- +Red- 10 ohm resistor – power supply output

or power supply output +Blue- +Blue- 15 ohm resistor – power supply output

The deep red system only uses one LED per resistor so the hookup would go power supply positive output to LED positive then LED negative would connect to negative power supply output through the 2.2 ohm resistor.

INSTRUCTIONS for use.

After you decide on the layout of your space and the positioning of your CEL you will need to devote most of your attention to the immediate growing environment. CEL is designed to capitalize on the natural relationship between humans and plants. If you are comfortable in the growing environment then your plants will be comfortable in the environment given the right amount of light. Pay attention to the directions on the products you use in your grow. Keep in mind plants need light, water, food, and air to grow. The purest ph balanced water available should be used in your grow. Fans are not necessary to cool the lights but they do help strengthen the stems and ruffle the leaves allowing light to penetrate deeper into the foliage. Try to keep the grow environment as natural as possible. Do not enclose your space unless it is necessary. The more space a plant has to grow the more it will flourish. Simpler is better, especially if it is your first attempt to grow under artificial light. Always design your grow for the end result. Count on your plants growing into the environment rather than filling up your space immediately.

Common lighting devices emit a wide range of radiation, including heat, often not needed for the intended purpose, illumination; and this energy is often pulsed at a high rate so it appears to be consistently on to the human eye but causing a drop in needed luminance at a specific wavelength and over a finite amount of time and space in relation to power consumption. Furthermore the heat generated is often removed by a fan or other method leading to more power use and heat generation.

Tech Specifications

Cool and efficient light providing consistent, constant, controlled, wavelength specific and directional illumination.

LEGAL

The present invention relates to a Cool and efficient light providing consistent, constant, controlled, wavelength specific and directional illumination. The cool efficient light (CEL for short) emits the wanted wavelengths of light directionally while dissipating the heat through the reflector. The light output can be smooth and not pulsed leading to a higher ratio of light over time. Choosing the right emitters for the intended use it is possible to emit wanted wavelengths of light in the wanted place with minimal extra radiation such as heat or UV rays.

The device is comprised of the following:

A. Wavelength specific emitter

B. Heat sink and reflector

C. Direct current power source

D. Load resistor OR current limiting device

E. Frame

F. Cool Efficient Light

G. Electrical conductor

The Cool Efficient Light (F) device is an electric device that emits desired wavelengths of energy including but not limited to visible light, such as a lighting fixture or light, and may be anywhere from very small, or terribly large.

The wavelength specific emitter (A) is an electronic device emitting specific wavelength(s) radiation including but not limited to visible light. The emitter (A) could include future yet to be invented or conceived emitters and current emitters such as but not limited to LED, light emitting diodes, and other devices that emit specific wavelength(s). The emitter (A) will emit its energy when some electricity is applied.

The heat sink and reflector (B) provides adequate heat dissipation for emitter function while reflecting usable energy in the desired direction. The heat sink and reflector (B) can be constructed of any materiel that provides enough heat dissipation for the emitter to operate including but not limited to aluminum. A polished surface is recommended to reflect as much energy as possible. The heat sink and reflector (B) can be constructed out of multiple pieces or out of one piece but should be assembled with an appropriate thermal compound or something in way to ensure proper thermal conductivity.

A more complex load resistor or current limiting device (D) may be used in order to control the release of energy. Smaller and more efficient components could allow for a smaller more streamlined frame (E). The direct current power source (C) and the load resistor or current limiting device (D) could be integrated as one unit. An onboard control computer could be added to control modulation of different emitters on the same light or to control the light over time. Furthermore lights could be controlled from a central device. Multiple emitters could also be used. Emitters that have multiple colors on the same device could also be used.

The cool efficient light (F) drawn has three heat sink and reflectors (B) but the cool efficient light (F) can have any number of any size heat sink and reflector(s). The frame (E) can be adjusted to any size or shape. Multiple emitters (A) can be attached to the heat sink reflector (B). Different or multiple direct current power sources (C) can be used. The load resistor or current limiting device (D) is connected between the wavelength specific emitter (A) and the direct current power source (C) to control the amount of electricity in the emitter (A).

Wavelength specific emitter(s) (A) can be place on the heat sink reflector (B) so the desired output is directed forward while the heat generated by the emitter(s) is dissipated by the heat sink reflector (B). The heat sink reflector(s) (B) with attached wavelength specific emitter(s) (A) can be fastened to the frame (E) along with the direct current power source(s) (C) and the load resistor(s) or current limiting device(s). Conductor(s) (G) connect the direct current power source(s) (C) to the wavelength specific emitter(s) (A) through the load resistor(s) or current limiting device(s) (D). All the components do not need to be connected to the frame or to each other in order to function as long as they are connected via the conductors (G). The direct current power supply(s) (C) and load resistor(s) or current limiting device(s) (D) could be in a separate frame (E) than the heat sink and reflector(s) and wavelength specific emitter(s) (A) as long as they are connected with conductor(s) (G).

The direct current power source (C) supplies electricity through the load resistor or current limiting device (D) to the wavelength specific emitter (A) that is attached to the heat sink reflector (B) and energy is emitted out of the wavelength specific emitter (A). The heat generated by the wavelength specific emitter (A) is dissipated by the heat sink and reflector (B) while the specific wavelengths produced are also directed by reflection.

When the direct current power supply (C) is connected to the wavelength specific emitter (A) and the load resistor or current limiting device (D) via the conductor (G) the electricity causes the wavelength specific emitter (A) to emit light that is reflected and heat that is dissipated through the heat sink and reflector (B).

Attach the wavelength specific emitter(s) (A) to the heat sink and reflector (B) in a way that ensures good thermal conductivity between devices. The heat sink and reflector should be made from a materiel that can dissipate enough heat from the wavelength specific emitter(s) (A) and reflect any usable energy in the desired direction. The wavelength specific emitter(s) (A) should be chosen for the required output and an appropriate load resistor or current limiting device (D) is placed in line with the direct current power source (C) and the wavelength specific emitter (A). The conductor (G) should be of sufficient size or capacity to safely conduct the electricity between the components. The direct current power source (C) should be rated to handle the load with proper safety factor. The components should be connected in accordance with manufactures specifications.

The direct current power source (C) and load resistor or current limiting device (D) can be combined. The direct current power source (C) and/or load resistor or current limiting device (D) can be moved to a separate unit. Additional devices can attach to the heat sink and reflector (B) to increase thermal mass such as but not limited to a water cooling system or fans. A switch or switches may be added for control.

The cool efficient light (F) works as long as the direct current power source (C) is supplying electricity. The cool efficient light (F) is used where efficiency is needed as well as wavelength specific output. The cool efficient light (F) can be used for any lighting application.

The cool efficient light (F) can be used for but not limited to fish tanks, horticulture, plant growth, live entertainment, still photography, desk lamps, photo therapy, human cell repair, concerts, film, TV, buildings, eco-friendly lighting, mobile homes, cars, military, parties, corporate events, landscape lighting, marine lighting, and space exploration.

Current lighting methods, including the sun, radiate a broad assortment of different wavelengths across the electromagnetic spectrum and extending into and in some cases past the infrared and ultraviolet spectrum. Humans, animals and plants do not need this entire spectrum to live and grow and furthermore certain wavelengths can be harmful to life. Current lighting fixtures can be wavelength specific but often the wrong wavelength is used or there is not enough of the needed wavelengths proportionally to the unneeded wavelengths such as heat. Also current makers of lighting fixtures often use modulation to drive the illuminator electronically. My light converts energy into the needed direct current to drive the emitter and therefore there is no pulse or strobe in the light output unless a modulator is introduced for that purpose.

QUICKSTART GUIDE

1. Remove all packing materials and visually inspect the CEL for any damage such as broken or frayed wires, dents, or any shipping damage. If the unit is damaged call tech support immediately.



2. Check that the supplied electricity matches the fixture rating , power up the CEL and check that all the LEDs are lit.



3. Position the CEL no more than five (5) feet away from what you want to grow. If the CEL is too close to the plant the LEDs will bleach spots on the plant. Experiment to find what works best for your particular situation. CEL will work in any orientation.



4. Maintain air temperature between 60 and 80 degrees for optimal growth. CEL reaches peak performance during this temperature range.



5. A timer is recommended to limit light exposure to 18 hours a day for vegetative growth cycle and 12 hours a day to simulate fall for blooming to take place in plants that are sensitive to a photo period.

Ready To Grow Cool Efficient Light (RTG CEL) by Richard Tyler Greene Jr is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.

www.growcel.com

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