Can I use 400W 20000K MH bulb

[ulis5714]

Thank you, sirvapealot! I have been doing a lot of research, believe me. I researched Jack's nutrients, and finally bought some. Then, I came across SUBCOOL's super soil mix, where all you need to add is water! More than one way to skin a cat, I reckon! I hope everyone does well with what works for them. I just cannot keep from thinking that not too long ago, it was thought that if you sailed out too far in the ocean, you would fall off the end of the earth. I am no rocket scientist, but I do sometimes get a kick out of others (on other sites) who are obviously very high and try to sound like they know it all! What a comedy! I hope to be able to discuss growing techniques with openminded people, such as yourself. Thank you for replying!

[Ford Fairlane]

As I understand it, THC is produced to protect the plant from UV. It follows that more UV= more THC.. However, heat is an enemy in a grow room and 200000K sounds pretty damn hot to me.. So if you can produce more UV without producing heat you may on to a winner..

[ulis5714]

That's what my research is showing. I do not know how much heat a MH 20000K bulb will emit, but you will have to have fans and good ventilation with any strong light. Maybe even a small air conditioner. I will attempt to contact the company that sells the bulbs I want to get details on the spectrum. I wonder if more UVB would cause a mutation in any seeds that were produced?

[STONEDAJ69]

In general, uv-b bulbs cant produce the same amount of UV as the sun - thus if that theory were true all outdoor grown plants SEED, would have mutations.

[ulis5714]

And I just found an article on the effects of UVB radiation on seeds. I will try to type the link: jpe.oxfordjournals.org/content/1/3/197.full. The article states that more UVB radiation may be beneficial to seeds. I would have thought there would be mutations of some kind, but I guess not.

[louise]

Have you got a link to what you were reading ulis5714?

 

Peace MongyMan

 

http://www.cannaversity.com/cannaversity/article.php?id=053

[ulis5714]

Thank you, lou lou! Can you teach me how you did that? I have only had this laptop about 2 years, and I am pretty much computer illiterate. I still type with 2 fingers, too! It's good to see you return. I am happy that others are interested in this stuff.

[louise]

Just cut the address from the page in question and then paste it into the reply window. The forum does the formatting automatically.

[ulis5714]

The effects of ultraviolet-B radiation and intraspecific competition on growth, pollination success, and lifetime female fitness in Phacelia campanularia and P. purshii (Hydrophyllaceae) I hope I did some good with this. I tried, anyway. It works! Thanks, lou lou! Oh, OK. I think I posted a link that was not allowed. Sorry about that! It won't happen again.www.elsevier.com/authored_subject_sections/L07/misc/Fitote_80_p207.pdf Let's see if this is better! This one is incomplete:Energy Citations Database (ECD) - - Document #6696642 Edited February 13, 2012 by ulis5714

[Ford Fairlane]

The effects of ultraviolet-B radiation and intraspecific competition on growth, pollination success, and lifetime female fitness in Phacelia campanularia and P. purshii (Hydrophyllaceae) I hope I did some good with this. I tried, anyway. It works! Thanks, lou lou! Oh, OK. I think I posted a link that was not allowed. Sorry about that! It won't happen again.www.elsevier.com/authored_subject_sections/L07/misc/Fitote_80_p207.pdf Let's see if this is better! This one is incomplete:Energy Citations Database (ECD) - - Document #6696642

Great articles thanks for posting those links..