Soon it will be legal to grow your own.

Now is the time to set up your own grow room.

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Lights For Growing Weed Indoors

¬†Growing weed indoors for the first time can be tricky …..

and you’ll waste a lot of time and money without the right guidance and this is where we come in.

We have a lot of experience locating seeds, using the correct soil and nutrients, cloning and choosing the right lights for the grow room.

This website will deal mainly with the different aspects of lighting but we will also have information that will help you choose the soil and nutrients as well as showing you how to set everything up to have a successful grow.

Don’t worry, we don’t like techno mumbo jumbo either and believe us, there is plenty of lighting and growing mumbo jumbo (bluish-reddish-this shows how techy we get!) out there so we’ll break it down and make it easy to understand.

Why bother?

If you want a decent amount of great reefer for the risk, time, and money you spend growing indoors, you must have decent lights or you’ll be disappointed.



T5 Grow Lights

Regular output lights are fairly inexpensive and cool to the touch and can be used. They are also available in high output with a wider light spectrum. We discuss the T5 and state our opinion here.





CFL: Compact Fluorescent Lamp

Inexpensive, no ballast needed, cool running, works okay but you won’t get maximum yield as the plants/buds tend to be smaller.

From your local store, CFL’s are sold with an output of 2700k lumen, good for flower growth and they are reasonable in price. CFL’s with a lumen range of 6400k lumen, good for vegetative growth have to be purchased at a specialty store at a much greater price.

CFL Bulb

100 Watt CFL Bulb

Great for rookies; learn about soil, additives, bugs, disease and lighting the first time around before investing in more expensive lights for the next grow.

We use the bulbs in clamp light holders (pictured) for starting clones and/or seedlings when they’re very young. We also use them to focus light on a certain section that may need more light.


Clamp Light Holder

Clamp Light Holder








MH: Metal Halide Bulbs

Cheaper than HPS and runs just about as hot.

Apollo 400 Watt MH Bulb

400 Watt MH Bulb

A ballast is needed for MH bulbs.

Best to use during the first 30 days of the vegging cycle.

If there is enough room, run the MH and the HPS bulbs at the same time during flowering.

Many growers use both through out the grow with great results and we have too.


HPS: High Pressure Sodium

Most expensive of the 3.

Apollo 400 watt HPS bulb

400 Watt HPS Bulb

A ballast is needed for HPS bulbs.

Using a wide spectrum HPS bulb (a little more expensive) gives more of a MH type (bluish) spectrum along with it’s reddish type spectrum, kind of like the best of both worlds.

We use the wide spectrum HPS along with MH bulbs and have great results.

We only use 400 Watt MH (metal halide) or HPS (high pressure sodium) bulbs in our grow room because of it’s small size.
The room is approximately 8 ft. x 10 ft. with a 6′ ceiling and one small window.

The heat generated by the lights prevent us from growing inside during the summer; thus, we only grow inside from October until May than switch to outside growing in the summer months.

The small room can get over one hundred degrees with the door closed so it must be monitored all the time. Very seldom do we leave the room unattended for more than 24 hours and if we do, we arrange for extra ventilation and lower the ballast to a smaller voltage.


Never touch the bulbs when they’re hot and never touch the bulbs with your bare fingers. Use a soft cloth or even better wear a pair of cotton work gloves when handling the bulbs.

Never water or spray/mist your plants when the bulbs are on or hot. Even a mist can cause them to explode.

Some ballast have a built in fan that aids in cooling. They do make noise but nothing unusual or annoying and we recommend using ballast with fans.

Lumatek ballast don’t have built in fans and they can get too hot to even touch.

Lumatek Ballast

Lumatek 400 Watt Ballast

Make sure the ballast is in a location with room for ventilation and is not touching anything except a flame retardant surface like a wire rack or a flat stone. We have used both and the wire racks work great as they allow for full ventilation and cooling.


What Light To Use When


Metal Halide Lights, also know as MH, are the best lights to use during the vegging cycle of your grow (the first 30-60 days).

Without getting technical, they provide the light that falls into the blueish spectrum which promotes the type of beginning growth you want for the awesome buds you’ll have coming later.

If you buy a dual ballast (handles both MH and HPS), it’s easy to use the MH bulb for the first 30 days of vegging than switch to the HPS (High Pressure Sodium) bulb to finish the veg cycle and move to the flowering stage.

If you have the room and the budget, using MH and HPS at the same time during the flowering stage works even better but just HPS is fine too.

It’s important to read and follow the suggestions on handling these bulbs as they can be fragile and dangerous.


NOTE about the Apollo Bulbs shown within this post

We tried the Apollo 400 watt dual ballast (MH and HPS) over a year ago mainly because it was the cheapest set up around. So cheap in fact it took us 6 months before buying one, I mean how can a set up more than 50% cheaper than the Lumateks we were using be any good?

The ballast is a little noisy (not a deal breaker) because it has it’s own fan but it runs cool enough you can leave your finger on it and not get hurt (do that with a Lumatek ballast and you’ll get burned they’re so hot).

I recommend using Apollo; they work well and you can’t beat the price. We haven’t any warranty issues with Apollo products and people who have all comment that the problem was taken care of satisfactorily. Plus they’re sold on Amazon. No matter what, Amazon makes sure the customer is satisfied so you really can’t lose.



In a Nut Shell


High Pressure Sodium Lights (HPS) use a ballast and provide light from the reddish type spectrum.

We promised low tech here and you can’t get any lower tech than “reddish”.

Go here if you want to read the techno mumbo about lighting but it boils down to what we are including in the sections here.

HPS is for the flowering cycle. Super HPS bulbs have a wider spectrum and include bluish light which promotes a more veggie growth.

This combination does work well and we also include straight MH lights as well.

The HPS bulb pictured is from Apollo purchased on Amazon. They are a fraction of the price of other bulbs and have worked fine for us.

We recommend giving the Apollo a try.

For seedlings or clones, we’ll start them under a 100 watt, 6400k CFL bulbs and a clamp light running 24/7 for the first couple of weeks.

It really depends on the strain/plant, but when your plants have a few fan leaves and are growing well and looking strong it will be time to switch over to the more powerful lights.

We’ll go another couple of weeks 24/7 with the more powerful bulbs than switch to 18 hours on and 6 hours off for another few weeks before switching over to GLR.

This will keep the plants in the vegetative cycle.

We use a digital timer to turn the lights on and off. We have also used a mechanical timer with great results but the digital one is a little more accurate.

Depending on your strain and time frame, you’ll want to veg between approximately 30 days and 60 days. In our opinion, the quality of the weed doesn’t change vegging for shorter periods of time (30 days). What does change will be the size and yield so consider that when deciding on long you want the veg cycle to run.

As long as the plants look strong and are growing well, you can start the flowering process in as little as 30 days by changing your lighting schedule to 12 hours on and 12 hours off.

You’ll notice white hairs within 14 days (those will be the females). Using the GLR, the flowers will show themselves much sooner.
The males show themselves much quicker than the females, sometimes in as little as 2 days! You can tell the male when you see clusters of tiny little balls growing.

Get rid of the males and you’re on your way to some great buds.

You can flower anywhere from about 30 to 60 days depending. If you go too long, the females will morph and turn the flowers into seed pods.

The pot will be just about as good, but the new seed pods really have a terrible taste (you’ll never get use to it) so don’t run the flower cycle too long.

We haven’t tracked the electrical expense very well because it’s really not a lot of money considering the great product produced.

Roughly speaking, running eight, 100 watt CFL bulbs, two, 400 watt MH and HPS bulbs along with one fan cost about $80.00 per month.

There is another lighting method for the veg cycle called the Gas Lamp Routine (GLR) that can reduce the cost of electricity quite a bit during the vegetative cycle.

When using GLR, run the lights 12 hours on, 5.5 hours off, 1 hour on, 5.5 hours off.

There are many explanations about why this works but in keeping with our low tech promise; by using the GLR you are building up the flowering hormone so when you flip to flowering, (12 hours on – 12 hours off) you will have more explosive budding in a faster amount of time.

We use GLR and recommend it.




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