blue MH bulb - NEEDED????????

Hey,


If I use a 1000 watt eye hortilux blue bulb MH for vegetative stage (graph near the bottom of http://www.eyehortilux.com/blue.html. And a HPS bulb for flowering...

Would I see a noticalbe difference in my yield by harvest time?



Also, I am having difficulty choosing a 1000 watt HPS bulb (graphs are on links - if needed - dont know how to read them)... The eye hortilux (http://www.eyehortilux.com/blue.html) or a sunmaster 1000 watt super out put HPS (http://www.sunmastergrowlamps.com/SunmSpecFam.html) or a growbright, etc.


Get ripped phycodelic, my main man

 

Salty, MH makes taller plants. HPS is my preferred light from start to finish;>)

 

By saltypimp:

"If I use a 1000 watt eye hortilux blue bulb MH for vegetative stage (graph near the bottom of http://www.eyehortilux.com/blue.html. And a HPS bulb for flowering...Would I see a noticalbe difference in my yield by harvest time?"

A difference as compared to what? I assume that you mean as compared to using only HPS all the way through. The "collective wisdom" on the subject of lighting changes faster than the actual technology. I believe the currant "best method" for HID lighting shows the best potential for overall improvement. The latest method uses the "dual spectrum" or "mixed spectrum" approach. That is, both MH and HPS lights are used at the same time in a power ratio of 2 to 1. Assume that all the HID's are the same power rating (600watts or whatever!). During the veg cycle, two MH's and and one HPS are used. During the flowering cycle, two HPS's and one MH are used. The reported results have been very impressive!

 

Out of boredom and curiosity i have been lookin around at a couple of different forums on the method you described above. Seems to me that if you had the money and the ventilation, three 600W HID lamps (2MH 1HPS for veg; 2HPS 1MH for flower, 4 bulbs 3 ballasts and reflectors) ran through cool tubes or cooled hoods would be a nice little setup. Seen a few grows done this way, and im going to have to agree with T.H., the results have been very impressive!

Sorry, this didn't have a whole lot to do with the topic but just had to throw in my two cents

- 42o -

 

The rule of thumb was always double the lumens from veg to flowering. A mix of HPS and MH does show gains in flowering I am still not to sure about veg though.

Have you found that the girls respond better to a single source (say 1k) vs an equivalent multi-source (say 2 400w + a 250w)?

 

Actually you raise a good point, tho i've never tried this experiment myself, most of the people that i've seen do it used the 2 MH and 1 HPS for rooting and vegging clones and seedlings, with no harmful effects. I think the key here in the early stages with this setup is light distance. Keep the lights a tad bit farther away then normal in the early and vegging stages, while gaining the benefits of having both MH and HPS spectrums. Then when switching to flowering, seems to me it's all on the plus side of things with this setup. Wouldn't mind trying it myself but im just a poor white boy with an expensive hobby

- 42o -

 

k im stoned, i didn't really answer your question. hahaha. anywho. In my experiences i've noticed that young and vegging plants respond better to multiple light sources rather than one. Instead of growing towards one main light source, let's say with 2 HID lamps, the spectrums kind of blend together making a broader area of light spectrum resulting in plants growing straight up no matter if they are in the very corner of the grow room or right under the lamps. I think multiple light sources are better than just one, unless you have a light rail or mover.

- 42o -

 

The fruits of one's labor are sweet!

The blending of the spectrums makes perfect sense.

The cool tube also would allow for more usable lumens as you should be able to have the light lower. Thereby gaining penetration. I am rambling. I still have lumens vs usable lumens (light height and the diminishing by the square rule for light) - multiple vs single source (irrespective of spectrum) thing in my head.