HID Time factor manipulation

[salmayo]

Yes, I use lots of Rosco brand filters. We spent most of a year on the 015 Yellowish Filter as a possible max transmission option to the standard Red filters we use right now. Standard transmission data is available from Rosco on all their filters. I've used transmissions as high as 90 to 95 percent affective transmission (Emitter/Filter matching), but the Dichroics are the better, if you want the end all in performance. (Ultimately transmission is a product of the spectrum to be filterred and the transmission of the filter band by band.)

The Dichroic filters are the best, but very pricy for general purpose applications. The nice thing about the dichroics is their durability, and precise cutoff bands, plus their reflected light can be used in veggging areas etc.

Krylon makes a usable "Stain Glass" color spray that has the same temperature characteristics as the outter color coating on a standard 25 Watt Party lamp.

"Judging from Pf/Pfr response graphs. A ton response in near UV 300-400nm range is noted. Would flouro blacklights timed opposite from 730nm lighting increase the switch between Pr/Pfr? I wonder. Seems to me that in a HPS system that has almost nothing in that range could use those in between far red cycles. Certainly 420-460nm blue grows plants better but I cant help but to think that 300-400nm might increase potency and flavor without getting too deep into actual UV-B."

"Oh, is there a time factor for fluorescent blacklights?" - We don't have that data for two reasons: (1) Fluorescent Blacklights don't have meaningful output in the desired visible and Far Red ranges, and (2) they trigger as a Blue "Day" spectrum recognized by the plants as a Blue photoperiodic signal, so they aren't usable for PAD timing.

We find a that Far Red is the desired 3rd spectrum after Red and (Far Blue) Blue, with UV being more of an area of contradictory data.

We have considerred Colorred Water Cooling as a hybrid way of dealing with spectrum filtration and cooling issues, but are worried about safety issues of the water cooling option. We put quite a few powerful methods on the back burner for safety concerns. (A highly flexible and versatile systems though.)

Take care, Sal.

[scott9116]

The colored water idea is brilliant, Sal. I was thinking about water cooling myself, but the condensation is more my fear than leaks. I have some water cooled heatsinks I made a few years ago for bridge rectifiers in a welding machine. I might save those for if or when I get into some LEDs. Very hot and humid in my area and I've had heat issues in the past. I have a great cooling and air flow system now but at the cost of kwHrs.

"Oh, is there a time factor for fluorescent blacklights?" - We don't have that data for two reasons: (1) Fluorescent Blacklights don't have meaningful output in the desired visible and Far Red ranges, and (2) they trigger as a Blue "Day" spectrum recognized by the plants as a Blue photoperiodic signal, so they aren't usable for PAD timing.


Sal, that's what I was thinking though. Additional 300nm-400nm during the day cycle. Quicker conversion from Pfr back to Pr state. Or, would it just increase that amount of time and power needed in to get back to Pfr state?

I cant find the article now but I recently read about flouro blacklights killing pathogens similar to UV but takes longer. 45 minutes or so to kill most influenza if I recall correctly.
:thumbsup:

[salmayo]

Sal, that's what I was thinking though. Additional 300nm-400nm during the day cycle. Quicker conversion from Pfr back to Pr state. Or, would it just increase that amount of time and power needed in to get back to Pfr state?

Phytochrome is always in constant flux between it two Pr and Pfr states, and reaches states of photoequalibrium, even in the dark it cycles between the two states reaching an equalibrium due to the two rates of conversion between the two states.


So it's not really a question of quicker, it's more an issue of WHAT state of equalibrium the combined wavelengths produce and a period of time needed to reach an equalibrium state.

Hope that's not to Quantuum Theory for ya, but it boils down to tracking large numbers of phytochrome molecules and the numbers of the populations of Pr and Pfr acting within the cells.

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I've considerred the condensation issue and concluded it would be an air handling issue and possibly adding a bit of adjustment to a liquid cooling systems flow, in order to keep the component temps above the condensation point, while still maintaining enough cooling capacity.

Take care, Sal.