Agriculture Reference
In-Depth Information
Always cover any power lights or LEDs on any electrical equipment in your grow room, to stop hermies
appearing
I run MH bulbs for 1 year before I replace them. HPS bulbs can go 1.5 years in my experience before
needing to be replaced. Make sure to use some type of record keeping about the date on which you first
fired up your bulb. I use a simple piece of masking tape on the hood with the date marked using a Sharpie.
AlsocomputerprogramslikeOutlookhavecalendarprogramswithreminders,andyourphoneusuallyhas
a scheduling application for reminders. You can always go with the most reliable and just mark it on a
larger type calendar in the grow room itself.
REV'S TIP
I get my Eye Blue 400 watt bulbs at Plantlighting Hydroponics online at: ht-
tp://www.plantlightinghydroponics.com/eye-blue-metal-halide-lamps-c-375_596.html .
Grow Room Temperatures and venting
This is a big deal! This is one of those classic things that will come back and bite you in the ass around
flowering time if you do not address it in the beginning. Using TLO methods, you do not have any need
to bring the bulbs in super close to the plants. I always keep a minimum distance of 18 inches and more
like 24 inches really, using 400 watt lamps. It's all good; don't worry about trying to squeeze every bit of
growth out of the plant by jamming a bulb down her throat, so to speak. In my experience, by having the
light this far away you won't sacrifice anything in yields, as long as your lights are in good shape. TLO
growing works better with your lights backed off a bit from what you would run them at using something
likehydroponicswithCO 2 additionstotheair.Toomuchheatisaverybadthingduringlatefloweringand
temperatures at the plant tops when lights are too close are often 10°F or more, higher than the growing
roomtemperatures.Thiscanresultin“bolting”whichisatypeofsuperstretchbroughtaboutbytempstoo
high at the plant tops and will result in airy buds and can cause hermaphrodites as well if the temps are too
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