Stoke
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- 18
I was chasing this rabbit for a good long while. I came to the conclusion that I do not need UVB. Honestly, if my buds were any stronger I would hear complaints. I use HPS in glass hoods, there is no difference in yield or quality compared to open hoods. Just pulled 62 ounces of Stardawg from 10 plants using 2k hps in glass hoods and fresh air exchange (no CO2). IMVHO..if you want more crystal laden and stronger potency buds, I recommend concentrating on genetics, environment, and nutrition.
If you are just experimenting..I would try the MH for the last 2 weeks. Folks tend to have success with doing that. I never hear anybody professing and jumping up and down that reptile lights or shop lights are game-changing in any way.
my 2% of a dollar
You actually called them and they recommend the 10k for more UVB? ..and what's up with "higher yield"??...shit man everybody knows MH will give you more potency and less yield...hence the reason peeps only use it at the end of flower and not the whole way through.
Personally, I would use the 5000k because it would be more of a "full spectrum" type lighting that is closest to natural daylight..but that's not necessarily going to give you more UVB. Kelvin has more to do with an arbitrary system of visible light and it's color and has little to do with how much artificial ultraviolet radiation a bulb emits. They're being slick by posting the wavelength charts and then posting the kelvin rating without any correlation. Then all they mention is that their bulbs are made with low-iron to alow UV radiation to pass through less filtered. An educated guess is the MH's would be comparable to each other in UVB output without the kelvin rating. Ceramic metal halide is most likely going to put out the most UVB of all the halides imho. Just be sure to lessen your exposure and wear eye protection.
Hm yeah, scratch that last part. It seems like most people who got great results doing a full grow with just the Sunpulse's were using a multi-light setup. I've got just the 1 hood for mine. However, I'm reading about great results from people using the 10k one in the final weeks of flowering. Sunpulse has a new model out (or coming out soon) and they are offering the older model 1000w 10k's for $35 so I'd say that's worth an experiment.
New bulbs huh?..interesting. I saw you posted up in the Best Bulb for Flowering thread. I take TK's word as gospel..on the simple fact that he has the most experience in production speaking on the matter. Hope you get a chance to re-read post #34 & #36. Pretty much sums it up for me when it comes to the Sunpulse experience. I only run 4 lights..but I keep coming back to these new philips bulbs and the epaps..exciting stuff goin on.
@Capulator uses the single ended Phillips' bulbs on the epap ballasts (I'm pretty sure it's not gavitas) and they have the select-a-watts. He says they are running somewhere around 660 watts and they are keeping up with the 1k's. He's running the single ended Phillips' bare bulb I do believe. Not exactly sure about these Phillips' or the double ended and their spectrums..I'm thinking they are full and giving off UVB..but I'm still in research mode on these.
This was my first grow I figured I needed all the help I could get lol.Oh and if you do use UVB lights you only use them for 30 minutes or so a day, and you will get more frost because the Trichomes are acting a s a "sunscreen". Probably not worth the set up costs for most and most good strains these days are already covered in frost under regular HID lights.
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