I can't say, and I never really thought about it. I was only curious if what was unable to be remembered about how to increase the female to male percentage was the information I posted or if it was different.
But if I were to venture a guess I would say the exact type of bulb, MH, CMH, conversion MH would not likely matter as long as the color spectrum would remain the same as what is considered optimal ... which might not be possible to get from those other types of bulbs ... but if it would I would tend to believe the plants would not 'care' in the least what design the light source was ... and only 'care' about the light spectrum they received.
On another note .... even if the information, which came from Dutch Passion Seeds, is accurate ... it is really pretty much worthless to just about every single grower. If you pay attention to it as you read it the word optimal is used repeatedly, as in optimal conditions, optimal environment, optimal lighting, optimal amounts of moisture, optimal amounts of ferts in optimal proportions. It does not mean what each individual grower sees as being optimal but instead what would be optimal for each individual strains genetics. Few if any growers achieve 100% optimal conditions for a single strain let alone for any and every strain they will grow.
So to me, if the info is accurate, it is interesting ... but nearly useless to most, if not all, growers. It is like being told how to build a space shuttle when you lack the skills and the setup and the equipment to then do what you learned. There is no singular across the board for every genetic combination 100% optimal conditions/environment/feeding/fertilizing etc. etc. etc. Possibly the only thing that would be universal would be lighting, but possibly not even that. If one strains genetics are largely from a region with very high amounts of UV-B rays and another from an area of very low UV-B rays that might make a difference. People only see their importance during flower, but keep in mind in nature they are there each and every day a plant grows, in differing amounts in different regions, and it is possible that could factor in depending on a strains genetics.
It mentions temperature but again individual genetics would have to play a part. It says lower temperatures equates to more females, but how would that work in nature in landrace strains in equatorial or tropical regions? That would mean in those conditions most seeds would be males. Going back to the late 60's and early 70's when I grew strains from such regions using bagseed from those strains on average I did not end up with a larger number of males to females than any time I have purchased regular beans of crosses.
It seemed contradictory to me for it to say that higher moisture/humidity of the seedbed would create a higher population of females. If you again look at nature consider the jungle strains, those that grow in tropical regions, regions with lots of rain and humidity, but also high temperatures. The ground will be moist there, but the temperatures high, so wouldn't it be logical that the one counteract the other? If high heat equates to increased percentages of males and high moisture content of the seedbed equates to increased percentages of females, when both conditions exist, which wins, which overcomes the other, or do they cancel each other out and a mid-way balance point is reached?
Personally I believe the info from Dutch Passion is basically propaganda and a way to blame growers for having more males or more hermies. When they first made feminized seeds they called them "female seeds." Many people got hermies and now and then a true male would popl up, though not very often, so they switched to calling their seeds feminized, meaning very highly likely to be female but don't be shocked if you get some hermies and the odd male now and then ... but to keep from looking like they are in any way responsible they claim that if ever condition is "optimal" you can count on female plants 90% to 95% of the time from regular beans and feminized ones should be females for sure.
They know that very, very few, if any, growers will achieve absolutely optimal conditions and environment and maintain it throughout a grow ... so when growers do not get a high percentage of females or they get a number of hermies, well, that was the fault of the grower by not creating and maintaining optimal conditions and environment etc. etc. etc. and it absolves Dutch Passion from any unwanted negative results a grower might experience.
But that is only my opinion ... and nothing more.
thanks brick ill give that a try next round all cmh...+ rep when i can i gave out too much already
