specific lighting question

I have grown a few crops inside as well as one outdoor before but i used tube fluros for lighting that I dont have anymore (i needed money and a friend needed lights). I was wondering as of ease, I am only grow 2 plants now and Im not going to let them get over 2 feet tall before I force them to flower. Would a floodlight bulb work for this? I know I am going to have to change it out once I start to flower, but right now I dont have the extra $, will this do for now?

anywho peace out fellow tokes i gotta go to work.

check out cfls. look for mogie post about them.

Yeah I got 4 cfl the other day at lowes. 13w each and they put out 800lumens each. It was like $7.59

Contributed by: Burramys Parvus
Thanks to: 11leafedleaf
Submitted: 03-25-2003
Images archived

BASIC INFORMATION
Compact fluorescents are close relatives of the 4ft tube fluorescents, commonly used in shops and schools for their white, soft light that does not cast any defined shadows. These lights are long tubes, usually 4ft long, filled with a gas that releases a photon of light when excited by electricity. The electricity is passed through the tube from the metal sections at either end, thus exciting the gas within and releasing photons of light. These lights must have a 'starter' which gets the light going initially, unlike incandescent which can just be turned on and off without one. Regular fluorescents usually emit 18w of light per tube, and cannot be plugged straight into a wall socket.

Compact fluorescents, on the other hand, are made for use in regular light sockets, and can easily be installed by anyone with basic handyman skills. Compact fluorescents are usually around 8inches long (not including the ballast, which usually adds about 3 inches to the total length) and emit minimal amounts of heat from the globe itself. Most of the heat emitted from a compact fluorescent comes from the ballast. These lights are usually between 8w and 27w, although some variation may occur between brands and uses.

The main reason people choose CF's over regular fluoro's is their compact ability! They are very 'movable' and can be positioned almost everywhere. They put out MUCH more light than their bigger cousins, while using only a fraction of the space.

Some of the many varieties of compact fluorescents.









Image contributed by: Locutus


NON-CULTIVATION USE OF COMPACT FLUORESCENTS

If you're running a large grow setup, and you're concerned about the spike in electricity, replace your regular light bulbs with compact fluoro’s around the house! They give off the same light, using only a fraction of the electricity. If you're running a HID light, and the electricity increase could kill you financially, or you're just worried about LEO, it might be a good idea to replace incandescent with compact fluoro’s. As an example, a 100w incandescent uses most of its energy giving off heat. If you replace all these 100w incandescent bulbs with ~20w energy saving compact fluoro's, you can dramatically reduce your energy bill, and help the environment at the same time. In fact, I recommend changing all your lights to CF's regardless of your growing situation, as they will save you $$ in the long-term, and save the environment.

The advantage with these lights is that the conversion from incandescent isn't complicated! Simply un-screw the old bulb, and screw in a compact fluoro! Done! You're on your way to energy saving paradise!


THE USE OF FLUORO'S FOR GROWING CANNABIS

Every grower has, or still uses these lights. Although they don’t even come close to the results from a HID light, they do however provide a cheap alternative for a newbie 'dabbling' in the fine art of growing. Instead of spending hundreds of dollars on an HID light, a newbie can purchase a compact fluorescent for a few bucks, and still have money for a coffee on the way home.

These lights are also excellent for starting seedlings and clones, as their cool light will not dry out the soil as fast as an HID. They have a low intensity, and are gentle on newly germinated seedlings, and are great for clones as they wont dry them out or give them too much of an early blast.

Compact fluoro's are also great for stealth grows, as they can be kept about 1 inch from the plants, and do not require extensive heat ventilation due to their warm operating temperature.


WHERE CAN I PURCHASE THESE LIGHTS?

Most lighting stores will sell them, but watch out, prices are very different depending on what type of shop you get them at! As lighting shops only sell lighting equipment, their prices can either be high or low, it really depends on the type of lighting shop it is. A designer lighting shop may end up being much more expensive, as they tend to be more directed towards the upper-class designer type customer, which extra $$ to spend. Hardware’s sell them, but their variety of lights is usually limited. Electricians, and assorted electrical shops will sell them, and this is most likely where you will get the best range and the best prices. My advice to you is, shop around! You wont regret it when you can save around 30% per light.


WHICH TYPE OF COMPACT FLUORESCENT LIGHT TO CHOOSE

For anyone growing cannabis, it is pointless to buy a weak light. Given the option of 8w, 15w and 27w, you would be stupid not to buy the 27watt, as they are more or less the same price. Compare the lumen output of each of the bulbs, different 27w bulbs may have different lumen outputs (depending on the manufacturer) and as with everything, the more lumens the better. You will also be given 2 options, the screw method of fitting, or the bayonet method (push and turn). My preference is the bayonet fitting. Make sure that you choose the right one for your socket! Also, do not choose a regular compact fluoro. Pick the one with the energy saving feature (will be explained why later on in the document). Now, for vegetative growth you should choose the 'cool white' light. This is also acceptable for flowering, but a 'warm white' light will be better as it is stronger in the red end of the light spectrum which is more suitable for flowering.

HOW DO I MAKE A SIMPLE REFLECTOR FOR YOUR COMPACT FLUORESCENT?

To build this reflector you will need a regular soda can, any brand will do, which you will need to rinse thoroughly until no residue is left inside. You will also need a good pair or scissor and a robust kitchen knife to cut the metal accordingly. An alternate method to remove the lid, would be to use a can opener. The lip of the lid can be used, and it will cut it cleanly. These tools should be chosen carefully as they will determine over failure or success of this construction. A lack of caution and a sharp metal edge can be fatal to your fingertips so think twice if your tools are capable of doing the job.



How and where to cut:
Firstly, draw a plan of your cutting path on the outside of the can using a permanent marker or a wax crayon. This will aid you to get a better overview of you plan and to avoid silly mistakes on the way.

Cutting the top part of the can out needs to be done first, adjusting the opening according to the size of your bulb. You do not have to cut it exactly to shape as glue (super or high-temp hot glue) can be used to stick the reflector to the bulb ballast later on. A can opener is the preffered tool for this job. The reflector is purposely not covering the ballast to ensure good aeration and to avoid damage to the ballast components, resulting in a short circuit.

Next, you will need to cut the main part of your soda can in half using your scissors. A hole may need to be drilled first using your kitchen knife to get a good starting point for the scissors.

The inside of the can is coated with a thin plastic layer that should not cause any trouble cutting through the sheet metal. The bottom side of the can does not have to remain in place but leaving it will add stability to the reflector and enhance the reflectivity. An extra hole can be cut into the bottom as well to improve ventilation along the bulb or to connect a 50mm pc-fan to the end.

Lastly, two more cuts have to be made into the sides of the semi-circle reflector to ensure that the sides do not reflect the light back to its origin but rather focus it to where it is needed. The reflector can now be bent according to your light requirements thus making it possible to focus it directly on your plants. If your reflector does not quite fit the bulb yet you can now use glue to stick it to the ballast.

HOW DO I MODIFY MY COMPACT FLUORESCENT?

The main advantages of modifying your compact fluorescent are:
· Reduced length of compact fluorescent
· Reduced heat build up (increased air-flow)
· No need for pre-made light sockets, saving you money

There is an even cheaper and more compact solution than to spend the extra cash on unnecessary light sockets and to end up with less usable space due to clumsy fixtures. All these problems can be avoided easily if one knows how to skips wiring a bulb socket and instead going straight to wiring the bulb itself. This requires some adjustments and modifications of the bulb casing but it can be done by simply following the steps provided.

For this example I will use a 23W Phillips fluoro bulb which is ideally used in confined spaces due to its compact size. The following pictures will illustrate the process of re-wiring this bulb and modifying it to meet the requirements of compact size and low cost.

This is the bulb I was referring to (23W, 1500 lumen)
Notice the upside-down “U” shaped tubes. These will require less airflow to cool the bulb as the air can move freely in between the tubes unlike those of conventional stick-like coils.




First, get a good pair of bending or clamping tongs and squeeze them tightly to the round connector plate of your CP fluoro and gently twist it off.

Never twist it off in a COMPLETE circular motion as the wires inside are still attached to the receptor plates and can sometimes break/rip if you apply too much pressure by twisting. Pulling is better than twisting. You will end up with two different wires sticking out the end. In this case, I cut the remaining plastic bit off in order to reduce the overall length of the bulb.

You will need to open the bulb ballast in order to make 2 separate holes in the plastic casing of the bulb for the two wires. This isn't hard at all, you simply need to drive a screwdriver in between the upper and the lower part of the casing and gently push them apart. There will be no glue required to stick them back together as the bulb has a push-slide-lock mechanism that simply snaps them back together. When you open the bulb, you should something similar to this even though not all ballasts are the same, depending on the manufacturer.



Now you need to drill two holes at the appropriate height for the two wires to be pulled through. Since its plastic that isn't all that hard either and can even be done with a pair of scissors.









After that, its just about putting the pieces back together and making sure the wires come through their designated hole. You can use hot glue to hold those wires in place but this is not recommended as the heat in that area of the bulb casing is very intense. Use only High-Temp glue!






If you are short of space or simply want a rigid construction, you can cut the bottom plastic part of the bulb of and use a bigger piece to distribute the weight more evenly. I used med-high temperature translucent hot glue to fit a piece of a 2” black PVC pipe onto the end of the bulb thus completely eliminating the need for a socket. This is just an optional step, as the bulb will hold without the extra support by simply gluing the sawed-off end to the predestined wall.

(ATTENTION: DO NOT USE the regular LOW TEMP Hot glue as it will melt at temperatures above 130 degrees Celsius which the bulb is capable of generating. ONLY, when gluing something DIRECTLY to the bulb casing, USE THE MEDIUM-HIGH temp. Hot glue, which will withstand significantly higher temperatures.)

Voila the final product of which you can wire as many in series or parallel as you desire. You can place these bulbs literally anywhere due their compact size and the low heat production, keeping in mind that the bare minimum between leaf tips and bulb should be 1cm (2/5 of an inch). Anything closer will result in prompt or delayed leaf burn.




This is just an example of how well suited these bulbs are for small spaces such as stealth boxes and small cloning chambers. It also illustrates the importance of ventilation as the smaller the box, the stronger the ventilation has to be to exchange the hot air buildup sufficiently.


This method is ideal for those who wish to wire a number of bulbs without spending even more money on bulb sockets. These might seem cheap when compared to the pricing of the bulb, but in the log run it is better to save a few bucks here and instead invest them in another area of growing or even another bulb. There is no need to have a possibility of replacement as the average lifetime guarantee on these bulbs lie between 10000 and 15000 hours, which means nearly two years of continuous use.

Wiring in CF's parallel:(Image by tipzijuana)

like wow bra. i actually read all of that, you could have posted a picture of the light bulb and been like use one of these. 25w 1500 lumens. and while I was straight wiring past everything but the bulb itself, i would install a timer . toggle swithch and dimmer to the cord that brings in the power to it. but yeah thanks for the advice man. why wouldent a normal floodlight bulb work though for the sake of curiosity?

What is tha minimal amount of lumens needed to sustain plant life

cool i got one of those bulbs today for $5 at the local dollar store. they are surprisingly bright as hell. I put a reflector on the thing but i think it would have worked fine without it. Im going to throw a few more into the equasion soon and see how it speeds things up.

pig-hatin-pothead said:

I am only grow 2 plants now and Im not going to let them get over 2 feet tall before I force them to flower

Click to expand...

If you don't have the HID to penetrate a 4 - 6 foot tall plant, i would start flowering alot sooner.