Indoor Production Table
About The Table
Each row represents a canopy space, each column represents a measure of light intensity available to that space. Where column and row intersect is a projected yield number in dried manicured ounces, this cell is a space/light/yield scenario. Some cells are color keyed to a specific HPS lamp, which is the lamp with the lowest wattage that can provide that space with that light and that yield. However, because yields shown are for the table's lumen/space combination, and not the actual lumen specs for that lamp, the yield may be slightly understated from the lamp's perspective. And though the difference is usually just a fraction of an ounce, you can get more precise yield and canopy space figures using yield calculators.
You'll notice that some cells don't show a lamp color and the yield number is in italics. The yield figure is correct for the given canopy space and light intensity combination, but these particular combinations don't have a matching real-world lamp. For all intents and purposes they are hypothetical combinations. For example: A 3 square foot space at 7,000 lumens per square foot requires 21,000 lumens, but none of the available HPS lamps supply 21,000 lumens. In the real world one would have to choose between a 150w lamp with 16,050 lumens or a 250w lamp with 28,000, which of course would force him to move to a different space/light/yield scenario altogether. The table tries to maintain this real-world perspective by not coloring scenarios that don't work with real lamps, and by drawing attention to those that do with the lamp's color.
The shaded area of the table, including the colored cells within it, marks the 5000-10000 lumen per square foot range. This is the range most growers use, though a few cells outside this range were included for smaller canopies and lamps. It's recommended that you try to restrict your choices to cells in the shaded area in order to avoid extremes of space or light. Extremely high available light levels require more cooling and ventilation resources due to the extreme heat generated. Extremely low levels of light require special attention to be given to the periphery of larger spaces where light levels are even lower and may not produce the type of growth desired. Larger gardens also require more work and time to maintain, and usually more plants.
About the Projected Yields
Yields were calculated using coefficients from Moon Doggie's Analyses for Lumens, 100% HPS Lumens, Hydroponic Media, and for a grower with average gardening experience (5 on a scale from 1 to 10) using a 63-day strain. Thus the yields shown on this page reflect those of the average hydro grower who uses HPS light exclusively.
Given the variable nature of weighing cannabis yields, of normal crop-to-crop production fluctuations, and differences due to acquired productivity skills, your actual yield will vary from those shown. However, if care is taken to avoid extremes, and if you planned for that rainy day surplus, with some normal growing experience you should have no trouble attaining these yields and will most likely exceed them after one or two crops. As mentioned above, these yields were computed for a grower with average gardening experience, not the Albert Einsteins or Michael Jordans or gurus of the growing world.
Using the Table
The table can be used several ways depending on what you know and what you want to find. Here's a few suggestions.
For space priority - Scan horizontally across the table.
For light priority - Scan vertically up and down the table.
If you know your space limitations and target production, but don't know what lighting to use. Find your canopy space in the left column then read across the line until you find a colored cell within the shaded area that meets your target production. The color coding suggests which lamp will supply the lumens for that yield.
If you have your HPS lamp and know your target production, but don't know what space to use. Find the color code for your lamp in the HPS Lamp Color Key, then in the shaded area look for your target production in cells having that color, there may be several. Consider the tradeoffs you'll be making between light and space, then choose the one that best fits your priorities.
If you don't know your target production you can learn more here, or you can use the self-sufficiency planner found in basic yield calculators.
|Yields for: 100% HPS Lumens, Hydroponic Medium, Average (5) Gardening Experience|
| Indoor Production in Ounces
for 600 space/light/yield scenarios
Average Available HPS Lumens per Square Foot