Originally Posted by khronik

A guide to cheap lighting for the broke newbie stoner

Fluorescent Bulbs
Fluorescent tubes have good efficiency and put out very little heat, but they usually aren't intense enough to produce a lot of buds. Still, for the vegetation stage of growing, they're great. All types of fluorescent bulbs usually have several numbers written on them that you should pay attention to.

One is the watts. This determines how much energy a bulb uses, and also how much light it gives off.

The other number is the spectrum. This is written as ****K, where **** is a 4-digit number. This is the temperature in Kelvin that an incandescent filament would have to reach to produce the same spectrum. For instance, 3000K is more yellowish-orange, while 6500K is very blue. Plants can absorb both ends of the visible light spectrum pretty well, but they reflect most of the middle, where yellows and greens are. For this reason, it's better to use either low or high spectrums for your plants. High spectrums are better for vegetating and low spectrums are better for budding. If you are only buying one kind, go for low spectrum, since you want a lot of buds, right?

Another number is lumens. This determines how bright a bulb looks to the human eye. This isn't the same as how bright the light would be to a plant, but it is of some use, for instance, when comparing bulbs with the same spectrum number.

Compact Fluorescents
The cheapest lighting, and probably the best lighting for a very small setup is compact fluorescent bulbs, usually abbreviated here as CFL. These are those curly high-efficiency lights that can replace incandescent bulbs. They can be purchased at wal-mart, three 26-watt bulbs for about $8-$10. You can get them at sites like Light Bulbs, Rope Lights, Halogen & Fluorescent Light Bulbs too, but since they're so cheap anyway, after shipping it's usually not worth it. When you buy them, they usually have two wattages on them, the actual wattage, and the wattage that an incandescent light bulb would have if it was the same brightness. The actual wattage is more important, but the equivalent wattage gives you a good idea of the brightness. Most CFLs have a spectrum of about 3000K.

You can buy higher-wattage CFL lights, but they're usually more expensive per watt. Still, they may be a good option if you're low on sockets to put your bulbs in. Most people have a few unused desk lamps laying around and use these for their lights. However, if you don't have spare lamps, you can buy a bunch of ceramic light bases at a hardware store and wire these to a board, then use that as your light. You need some electrical experience for that though.

Even if you're not planning on growing pot, you should buy some of these bulbs anyway for your lighting needs, because they only use like 1/4 the power of regular light bulbs.

Fluorescent Tubes
If you have a somewhat larger operation, fluorescent tubes might be a better option. The cheapest fluorescent lighting per watt usually comes from the 48-inch tubes. Tubes are designated a number, like T12, T8, or T5. The main thing this tells you is the diameter of the tube in eighths of an inch. A T12 is 12/8 of an inch, or 1.5 inches in diameter, for example. However, different tube sizes usually require different wattages, and many ballasts can only handle very specific wattages. You can get 48" shop lights in Lowe's or Home Depot for about $9 for a two-tube fixture. You have to buy the tubes separately, and they're about $3-$4 apiece in Lowe's or Home Depot, or about $5 apiece at wal-mart. Shop lights can often use both T8 and T12 tubes, but make sure you read the directions. If you have a choice, you should usually go with the higher wattage.

The great thing about fluorescent tubes is that they can be touching the plants without harming them, so you can put them very close. The bad thing about fluorescent tubes is that they don't give off a whole lot of light considering how big they are. This can be mitigated by using more tubes, but the tubes are kind of big so you can only use so many.

One type of fluorescent tube that is becoming more popular is high-output T5 tubes. These are very thin, so you can pack them closer together, and thus produce more light. Fixtures for these bulbs are a lot more expensive though, and may necessitate a trip to a hydroponics store.

Hardware stores usually also sell plant and aquarium bulbs that emit a spectrum close to what plants use. The consensus seems to be that these are only marginally better than regular tubes, and they're a lot more expensive, (about $10 apiece) so they're usually not worth it.

High-Intensity Discharge Lighting
All the best growers use HID lighting, and if you want lots of bud, you should too! These come primarily in two flavors, metal halide (MH) and high-pressure sodium (HPS). These are very efficient, bright lights, and they're what streetlights almost always use. If you look across any city at night, you'll see a lot of bluish lights and a lot of orangish lights. The blue ones are MH and the orange ones are HPS. HID lighting requires a bulb and a ballast, and ballasts are usually very specific about what bulbs they can be used with.

Digital (Electronic) vs. Magnetic Ballasts
Digital ballasts are slightly better in nearly every way than magnetic ballasts, but they are a lot more expensive. They produce much less heat and noise, and allow your bulb to last longer while producing more light. They also work with both HPS and MH bulbs. They will be very expensive at hydroponics stores, but you can usually get them on ebay for a lot cheaper. The following ebay stores usually have good deals on both digital and magnetic ballasts:

eBay Store - My Garden Shoppe: 600 watt digital ballast, Lighting Systems, Hydroponic Systems
eBay Store - High Tech Garden Supply: Light Bulbs Lamps, Advanced Nutrients, T-5 FLUORESCENT Grow Lights

Don't worry too much if a digital ballast is out of your price range. Magnetic ballasts are a good tried-and-true technology, and the digital ones are only about 10%-15% better. If you have a lot of time and not much cash, you may even be interested in getting a ballast kit, which lets you build your own ballast for not much money. You need some sort of case for it, and it seems old computer power supplies work well. You'd also need some sort of reflector, and a socket, and wire, so by the time you're done building it, it may not be such a great deal after all, but if you have access to that stuff, it may be well worth it. Here are the best deals I know of on kits:

High Pressure Sodium (HPS) Ballast Kits - Plantlighting Hydroponics & Grow Lights

Metal Halide Lighting
Metal halide bulbs are used for the vegetation phase. However, these are not a very good choice for small operations because they are expensive. With some ballasts you can switch bulbs for vegetation and flowering, but this means that you can only be growing one batch at a time. Also, you don't need super-bright light for vegetation, and using the same number of watts for both flowering and vegetation is overkill. Many if not most small growers vegetate under some form of fluorescent light and then move to a HPS light for flowering. Still, using a small MH bulb (100-250 watts) might be a good option, and you can get those types of lights in many hardware stores, although they will definitely be more expensive than say, fluorescents.

High Pressure Sodium
If you want to have one expensive light, make it one of these. That's not to say it HAS to be expensive, but this is the light that will have the greatest impact on your yield. For less than 10 plants, 400 watts is a good starting point. HPS bulbs are very orange, and are great for budding. There are special HPS bulbs for growing plants that also emit more blue light. They are quite a bit more expensive, but if you're on a budget, the regular HPS bulbs are very decent too. You can get HPS bulbs at eBay or Light Bulbs, Rope Lights, Halogen & Fluorescent Light Bulbs, or even at Lowe's or Home Depot, if you're paranoid about the police looking at your expenses. (although hardware stores usually only go up to 400-watt) If you want an inexpensive setup, this ebay store has some of the best deals I've seen:

eBay Store - High Tech Garden Supply: Light Bulbs Lamps, Advanced Nutrients, T-5 FLUORESCENT Grow Lights

Supposedly Welcome - InsideSun has good deals too, but I've heard their lights are not so great, and run really hot.

Other Lighting

Incandescent Bulbs
Do not use these. Same goes for halogens, and mercury vapor lights.

LED Lighting
This has a lot of promise, but to be honest, results have not been so good with these. They can only be used for vegetation and aren't that great even for that, since (like any first-time grower who decides to use them) they just aren't very bright. Still, they use very little electricity, they last for like 20 years, and they can be made to release light only on spectrums that plants can use. They are expensive, but you can get them for relatively cheap here:

LED Grow Lights Gro-Tek GroTec HID Hydroponic light Fluorescent leds Growing Metal halide MH growing indoors indoor Ultraviolet Infrared light emitting diodes

Sulfur Lamps
These are not available commercially yet, and if they were they would be very expensive. However, they are very bright, and I am writing another thread about sulfur lights, which I hope will be helpful to anyone interested.

I hope this has been sort of helpful. Just so you know I'm no expert grower but I do know a lot about electric lighting and I thought I would share this with you. Peace!

Originally Posted by psteve

4 23 to 37 watt, compact fluorescent bulbs. 2 for $9.98 x2 =

DO NOT use bulbs brighter than 30 watts max.

Originally Posted by SMOKEDAWG81

TO: Psteve
I like that 8 bulb get up, that is really inventive. I think I might have to take your idea. Do u think I could grow 2 plants from that? Or just stick w/ the 1 plant?

Originally Posted by cygnustaxt

I'm curious as to how many plants I will be able to grow with this set up.