Off the shelf retail store screw-in LED and CFL bulb comparisons

[chronosync]

Thanks man! These still got 20 days to go EASY

I grew all these same cuts at least once and never took them past 65 but with hardly an amber trich to be scoped so maybe Ill go a full ten on em.

I lost power for two days straight and all they got nothing but filtered sunlight from overcast skies through indoor windows, anyone have any experience with delays like that?

 

[repuk]

Wow those flowers look yummy, look all that frost! 20 days still? calyxes look fat already!

Blackout

Never happened to me, but I guess it also happens in nature (several overcast/stormy days) and plants should stall but be fine.

All you can do is look out to ensure all the rest of environmental conditions don't change or go ashtray due to this (no light, no heat, maybe raising humidity?).

Wait, it happened to me once, I didn't realize the HPS 600W bulb went out until two days later. Other than no new development on the girls for those days, I didn't have a problem.

Once all the hood and timber fell off the "ceiling" and remain lit for 24 hours on top of my scrogged plants for a day. Other than burnt leaves, crushed stems and a canopy flattening aid, no consequences, girls recovered in three days.

Cannabis is a really hard plant.

Hey, the blackout may even act as some sort of finishing stimuli, I wouldn't sweat over it, your girls will be fine (and there's nothing you can do either, so why bother?)

 

[chronosync]

Its true, nothing to do about it now except wait and thats all it is in bloom anyhow: keep her steady and hold fast.

I cant believe how low Im feeding at this point; cut the fat and all theyre getting is 200-300ppms base for the past few weeks. minus the 60-75ppms tap/ro, bud candy clone im using, v+b +Life and seaweed, my mixes are still under 500ppm (1.0ec)

LOVING THE SILs GUYS !!!

 

[Terpene]

Terpene, in your experience do 6500K help in the frost department as 5000K? (5000K being more elusive to find around here). What is the proportion you're running lately? with even you mean 50/50?

I’ve never used 6500k bulbs, though I’d have to imagine that they’d show similar results to 5000k the way 2700k / 3000k do on the warm side of the spectrum.
Yes, I am in a 50/50 mix of 3/5k bulbs because they’re easy to find by me.

How about a 6500K UV-B CFL instead of 5000K LED? I ran all 2700K last round and was really dissapointed, the yield was pretty much the same as with all 4000K and UVB, just less of everything (smell, taste, frost). Even the genetics were supposedly better than before, but that didn't help.

Adding UV should increase frost output as the plant will have to protect itself against the light. On the other hand, you’re comparing completely different genetics on different lights which means it’s an apples and oranges comparison. As I’ve said in the past, there’s a minimal size increase with warm lights, but blue lights produce frostier plants. If it were me, I think I’d run a mix of the two colors of bulbs you have to round out the spectrums, toss in the UV and call it a day.

 

[jonhova]

35 days flower

35 days flower

72 watts of screw in bulbs

 

[repuk]

2nd week in flower

2nd week in flower

Note main stem size of Kalichakra, (was about one month veg) 2nd week into flower (prior to training and pruning lower shoots, larf, etc).

Blumat next to it should give an idea of the girth... more than an inch.

 

[Charass]

19. day on flower. 150W e27 led. DWC

19. day on flower. 150W e27 led. DWC

View image in gallery​

View image in gallery​

View image in gallery​

 

[Bahseado]

kudos for the scrogging skills Bahseado!

Looking into gpw figures, betting you'll hit the gpw!

What are the color temps of the bulbs? Have you observed differences on canopy reaction/formation under different light temp bulbs?

Thank you, repuk! And well remembered about the color temps, forgot to mention! They are all 6k/6.5k K. I used some bulbs I had around, so I didn't give much importance about it as it was my first try, but I'll definitely use some 3k ish, and also a mix of them, and see which works out best.


@chronosync and @terpene amazing pics!

 

[Terpene]

A very pineapple-ish smelling Ace Panama x Zamaldelica at 11.5 week chop under screw in LEDs at 20w per sqft:

 

[q3corn]

Looks great Terpene!

 

[SkunkFunk49]

After reading a little bit of the thread I made my own from what I seen on here. Veg bin had 4x 13w cfl now it has 6x 9w led. The led seem more unidirectional which should help with light intensity coming down on the plants. And I got 5" of extra head room which is real nice. I just have to wire it up and add some support in the middle. Thanks to all who like to tinker and come up with stuff like this.

 

[Mr Pyr0]

A very pineapple-ish smelling Ace Panama x Zamaldelica at 11.5 week chop under screw in LEDs at 20w per sqft:

View Image

View Image

That's very impressive for just 20W/sqft, do you thnik it would have done better under more intense light or do some strains perfer lower light levels ?

 

[pANicModE]

3 lill clones of My hybrid “HOLY SHISH OG”
Jesus og x shishkeberry [fems]

 

[repuk]

SILs vs COB observations

SILs vs COB observations

100% SIL tent
Is it really noticeable on the SIL tent on this run (these are clones taken from previous run plants, which were grown using a 400W HPS) that the SILs seemed to:

- Induce plants to be less leafy
- shorter, more homogeneous internodes
- develop smallish leaves (from what I've seen on plants from seed)
- Aid into shaping a level canopy
- Fatter, thicker stems
- Stronger aroma: Kalichakra already reeks of sandalwood... on previous run that didn't happen until week 8, suspect different nutes have to do with this too.

So far, SILs seem to be a win-win for scrog as they seem to induce growing patterns ideal for it: better aireation and light penetration.

SILs tent, cenital shot, 1st day 4th week into flower:

Something I've noticed: budsites kind of "glow" yellow-lime-green under the SILs, not noticeable once you bring them outdoors under natural light.

Vertical shot: looks crammed but canopy is not that dense thanks to smallish leaves:

SILs vs COBs/HPS
Additionally, I put two clones from same mom, one under a SIL, the other under the COBs on the ACE Tent.

Initial Conclusions:
Looking at both and comparing I can definitely say plant under the SILs tend to be less leafy, and develop smaller leaves than the one under the COB.

Plant under the SILs has a darker green hue (noticeable with grower glasses) than the one under the COB, and eats less (comparing by pot weight, both get the same amount of fertigation).

COB is about 4 inches from one of these clones tops with no apparent bleaching so far... perplexed...

Plant under the COB (3000K) stretched about 2-3inches less.

 

[Terpene]

That's very impressive for just 20W/sqft, do you thnik it would have done better under more intense light or do some strains perfer lower light levels ?

Everything does better with more intense light, I am admittedly half assing it - but I only need 2 computer fans to cool my setup, so I am more than happy with things.

 

[Sport Farmer]

Something about the 100w Eco smart brand from Home deeps makes one of my plants super pissed off and gives it what looks like a zinc deficiency or something but it is otherwise healthy... It's something genetic in the strain and this certain spectrum - I run the daylight/soft white combo... It's very strange.

Anyone else ever seen this before? (lower bottom right plant)

 

[Athos]

looks like heat stress

 

[Sport Farmer]

Uh, no... it's not heat stress. It's 70-72 in my tent with awesome airflow. It's something about the LED spectrum. I already wrote that.

 

[igrowone]

looks like a variegated plant, which would likely be genetics
kind of unusual look for variegation, but it's my guess

 

[repuk]

Wow Spot Farmer is that a Peyote Purple on the left back corner?

Whats the deficiency strain? looks like an indica leaning one?

LEDs seems to raise the metabolic rate and can induce deficiencies on certain strains, specially under high light intensities.

I assume you feed all the same? Is that RDWC? What's your light setup (how many 100W SILs?)