1st thing you need to do is arrange a place for the light you will be using . The Flowering room for your plants will need the biggest light. Lets assume you have acquired an HID ( High Intensity Discharge ) light .
Light intensity doubles for every 6 inches closer the plant is to the light source, if you have low light you will have a plant that will stre - - tch. This is bad it will increase the internodes distance, you want as many internodes as possible because each one of these is where the fruit or flower will grow from.
For the Average grower you are going to benefit more from a 400W High Pressure Sodium Fixture *They Provide More USABLE light because they can be placed much closer .
Intensity = Light / Distance ( squared)
Distance 400 WATT HPS Lumens
| 1 foot | 50,000 Lumens | |
| 2 feet | 12,500 Lumens | |
| 3 feet | 5,555 Lumens | |
| 4 feet | 3,571 Lumens |
- measure the distance from the floor to the roof.
A. Subtract 1 foot space for the light
B. Subtract Another 2 Feet for Light vs. Plant Space
C. Subtract the height of the plant before flower X3
D. Subtract height of hydro/aero Unit.
Now that you have enough space you can slowly start to lower the light daily until its too hot for the plant.
A. One way to test this is the popular hand trick which entails placing your hand at the level of the plant if it becomes too warm or even hot then you will heighten until its moderate to warm.
This will allow enough space for even the fastest growing plants.Different stage plants need different environments as shown in the image above!!
This shows the delicate balance between spacing and light distance… Take note of how the plants start competing for light even just after seedling stage if not spaced enough
