Now Available For Download:

1) - Proven DNF Custom Feeding Program - includes additives for use.

2) - Grow Room Lighting Setup:

Basic rules for lighting: A 1000 watt will "could" cover a 10' by 10' Grow area, 8' x 8' would be more adequate if it had proper ventilation. With a 600 watt grow light, it will cover about 5' by 5' "or so" and a 400 watt will cover about 3' by 3' "or so", at max a 4' by 4' room could stand a 1000 watt bulb "depends on many factors" .
IF using a 1000 watt bulb in an area of 10 feet by 10 feet, it could be skimping a little, however it could be very wasteful "shy on adequate lighting" considering the plants on the outside will get very little light, however, tricks could be implemented to achieve less waste, rotating the plants on a daily basis could help reduce this skimping, place your plants on movable trays "trays on wheels", and spin them regularly, shuffle plants that are closer to the light with plants farther away from the light, etc...

 Hint: If going by the above scenario, if your grow pots were situated on mobile turn-tables "small homemade dolly" you could shift them around without too much effort, this in itself could significantly enhance your yield.   "Many practice this with great results!"

It is actually better to use two 600's or 4 400's you can place them closer and get more for your money, however if you do choose to put a 1000 watt in a 4 by 4 space then you better have some serious ventilation because it will produce a lot of heat during light cycles.
From my personal experience a 1000 watt fixture could also be good for a 4' x 4' area. This is a general rule of thumb based on horticultural growth rate requirements of about 50 watts per square foot... Note: adequate ventilation is required!

4' x 4' at 50 watts "good recommendation" per square foot would require 800 watts. 1000 watts would be optimal and would guarantee proper light penetration up to 4' x 4'.

However, larger areas CAN be used with success. When growing indoors one important key is to have all your grow lights properly situated "equally apart" and use the PROPER reflector's, this ensures you're using all the light the bulb/s are producing within that given space and none is being wasted. Any light that "leaks" out is unused light and the efficiency of your bulb and setup immediately begins to diminish..

Now, going by the above recommendations, will greatly increase the necessity for proper ventilation. But luckily with all the air circulation products on the market today, this can easily be archived, not to mention air cooled reflectors and cool-tubes available out there, the ventilation possibilities are endless.

   The most important aspect of ventilating small grow spaces is creating a negative pressure environment. This is done by having an exhaust that's larger than the intake "this can be archived in many different ways, for example; You could use 2 exact same fans and have one on a variable speed control to reduce its CFM!".
Setting this up properly ensures all the air is being circulated and replaced which will dramatically help with cooling  and air flow of confined "closed in" spaces.
The more light you can push through your grow room, the better.  Exercise those tactics in your 4x4 room; you might be surprised at the outcome.......
Example "see images below" of Grow Room lighting configurations in different size rooms, examples are shown in a room that is 16' x 20' long in addition to options for a grow room that is 25' X 25' long.

The first example setup below is for a 16' x 20' room setup that works great with 8 hps "or MH" lights and a 25 pot configuration of 15 to 20 gal pots. These example setups are for demonstration purposes only. In the following example images, we only show the actual lighting / positioning setup; "Exhaust fans, intake fans, oscillating fans, flushing table / setups etc..., are not shown in these lighting scenarios."

Note: Using the possible lighting setups shown below, your plants are not situated directly under the lights themselves, therefore also benefiting from the adjacent lights!

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Grow Room Lighting Setup ideas: Below you will find 3 examples of working grow room lighting setups. Setup ideas from a 16' x 25' room to 25' x 25' room lighting setup.