Forums Cannabiques Francophones (FCF)

leMarcel a écrit : Une petite précision, ces ampoules CMH sont compatibles avec les ballasts magnétiques, mais pas avec les ballasts électroniques !

CMH is ALLOT better then Philips Greenpower/SON-T & PLUS

You will LOVE Philips 400 CMH we carry....
Customers see a Positive Difference withing 2 days when they relamp during Grow.

lord_preston a écrit : Les ricains aiment les MH en flo aussi, mais je ne comprend pas pourquoi. Ptêtre qu'ils prefèrent fumé des feuilles

Light from the sun is ideal but it's not the same as artificial light, where output quality, spectrum etc varies upon the type of lamp and how it is used. Many growers think that more lumens = better growth / yields, when in fact artificial light, even at its best in a HID or HPS lamp in not so good in terms of colours. Much of the light from the bulb is not used by the plant, mainly because it is not in the 400 to 700 nw (nanawave) spectrum, and plants can only see and use light in this range. Light quality and its colours are as important as lumens.

Light, as seen by plants is not a single colour but separate bands of active colours and the plant senses each colour-band of light as a separate signal. Each band of colour has a different effect on plants and the following are only a few of the functions which each band of light promotes.

Blue Light (350 – 500 NW) powers chlorophyll production, powers cell actively, energies the stomata movement and makes the plant follow light.

Green / Yellow Light (500 – 650 nw) ~ not much action from these bands of light.

Red Light (600 – 700 NW) makes sugar from CO2, powers chloroplast production, signals light and dark times among other functions.

Strong blue and red light photons (as above) are also needed for good carbon dioxide uptake.

The PAR scale measures all these coloured photons between 400nw & 700nw, the critical range for plants, as this is only range that plants can use light. If it is not in this range then it's wasted light.

A large HID lamp may give out loads of lumens, but if it's too far away from your plant most are wasted (remember light intensity diminishes with distance) In addition the light a plant can use from these lamps is limited because the plant cannot see or use it because it is in the wrong spectrum.

Lumens make me laugh!! Not a measurement that I consider all that important. I would rather look at photon production and spectrum coverage relative to total energy out put. There are qualities that show up in strains when they are given the full spectrum coverage that are not there or as pronounced with the very narrow spectrum "shots/spikes" that the best HPS bulbs have. Ie. vigor, TIGHT nodes, resin production, flavour, aroma, root growth, resistance to disease/insects, yield and potency.

It seems that the best HPS bulbs are like a fert program that feeds required levels of N-P-K, but very minimal to deficient levels of mag, calcium, boron, iron............ I don't get it?

Azeotrope

if your after Ultimate Quality CMH can only be beaten by growing outside..
also the CMH dumps UV that is proven to be needed to Fill the THC sacks HPS DOESN'T FILL Glands FOR CRAP FACT... the plant needs as close to all NM ranges to Fully produce..

you need blue during Flower aswell its just that if u only chose one lamp you would get a hps but it was allays good to run MH and HPS till CMH..