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09-29-2005, 02:55 AM #4Senior Member
Hortilux 600w...?
Originally Posted by RastaKaze
Plants use specific light waves for specific processes. The light from the sun comes in certain intensities or frequencies or energy vibrations....the sun delivers this and it is measured in Kelvins....the rate or 'temperature' of matter.
Daylight in spring and fall hit the earth at a specific angle and is thus measured at a specific kelvin...while in summer the angle of light is again altered due to the earths wobble.
[remember the earth is actually closer to the sun in the winter time....but still much colder. in the summer time, the earth is furthest away from the sun, yet hotter. that is because of the axis tilt towards the sun]
Some plants flower in spring light....some plants flower in summer...some plants flower in fall.
But each plant flowers based upon the length of light per day or whether the light is getting longer each day or shorter...this ALTERS KELVINS.
For the particular kinds of plants grown by us tomato farmers....the plant begins to flower upon the growing shorter periods of daylight. THis particular light is BLUE TURNING ORANGE TURNING RED [LOWERINZG KELVIN TEMPS] until December 21, as the earth is now wobbling 'away' from the sun.
On December 22th, the light changes back to where the days begin to get longer....thus you have the RED TURNING ORANGE TURNING BLUE....[RAISING KELVIN TEMPS].
Simple math......
MH has avg Kelvins higher than HPS.
MH has avg Kelvins not produced in natural in fall or flower season for our tomato plants.
I just simply say, why is MH needed in flower period at all??????
It isn't. The Kelvin temps of MH simply arent the right frequency or color for a fall flower.
It isnt BAD for the plant at all...but why is it there and what purpose does it serve being there?????
The new bulbs you are referring to make it a ONE BULB for entire grow.
Great!
But, if you have the space, money and will, you will still get better results, I believe, if you give the plant the light that it needs at the time it needs it.
Now, if you are broke, or money is tight, or space is tight or some other reason, perhaps the new bulb is perfect.
But...in vegg...dont get rid of the higher Kelvin MH and replace with a lower kelvin bulb by putting an 'enhanced spectrum' bulb in there. You will accomplish lowering your Kelvins at a time when you would want them highest.
For veg, if I have a 500W MH bulb, I would rather have that, and so would the plant...instead of a 500W enhanced spectrum bulb.
The enhanced red waves do little for the plant at that time when you could be giving it the full Kelvins you can with an MH.
The same is true for flowering.....our plants needs more red...or lower Kelvins....and having an MH or enhanced specturm bulb is only going to raise the Kelvins....
Hey the new bulbs beat the hell out of any ONE SINGLE type of bulb...CFL, MH or HPS.....
But our tomato plants simply grow best when given what THEY need...not what WE think they need.
If you can only get one bulb, sure go for it.
But if you can afford all three types of bulbs....and have them in the needed strength and concentration, then you have the lights you need for the specific stage of growth for our plants.
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