Lighting UVB advice .

[hecno]

Ok guys what do you think about this kit , @Waira as you are using UV - yes I spotted it - what do you think .

KIT CONTENTS

The kit contains

• 3 x 280mm Zhaga MCPCB each with 15 pcs of Semileds UVA Leds in selectable wavelengths. Forward Voltage Nominal 49V
• 1 x ERP, 160 watt Dimmable LED Driver
• 1 x 0-10V Dimmer
• 2 x 221-412 AC Power Connector
• 3 x 221-413 Series wiring Led Connectors
• 3 x Thermal Interface Pads for heatsink connectivity

PERFORMANCE
Specifications

32000 mw of photon radiation at 1amp operation

System Performance: 2.25 umol/j

Power 145 Watts

Perfect for supplement for 2 to 3 Square feet flowering

 

[bakEQuatorial]

Im no Waira for sure but its Hecno! My OG mentor! I'm gonna jump in and give my worthless 2 cents anyways. Not that my OG mentor needs it though.

My 2 cents is this. Most research attribute the increase in trichs/ potency to UVB spectrum. The UVB lights commonly used by growers are:

1. Reptile lights with UVA in high amounts and UVB in 3/5/10/15/20 percent range. These mimic desert sunlight to help reptiles with Calcium production. Cons…very unreliable UVB content and short lifespan. You cannot see the UVB degradation with your eyes so thats tricky. You also need lots of them as these CFL or fluoro bulbs don't spread that well and you need them close.

2. UVB MH lights which are small wattage 70-80W per bulb lights no different than normal MH lights except they are optimized for UVB. These are used by succulent/cacti type growers. The UVA/UVB combo prevents stretching and gives them those vibrant colors. I use these.

3. LED tech still cannot economically produce UVB spectrum. UVA is much cheaper to produce. Just search for pure UVB diodes used by industries. They cost an arm and a leg so if any LED maker claims to have UVB but prices don't reflect it, its definitely a scam!

So what we really want is the UVB. Most UVB bulbs already have lotsa UVA.

I feel that the recent craze with UVA diodes is likely a gimmick. There are research that claims UVA helps improve flavors/terps but I don't believe it will be significant without the UVB combo.

Note: we don't want UVC at all!

Hope it helps!

 

[idiopathic neuropathy]

Im no Waira for sure but its Hecno! My OG mentor! I'm gonna jump in and give my worthless 2 cents anyways. Not that my OG mentor needs it though.

My 2 cents is this. Most research attribute the increase in trichs/ potency to UVB spectrum. The UVB lights commonly used by growers are:

1. Reptile lights with UVA in high amounts and UVB in 3/5/10/15/20 percent range. These mimic desert sunlight to help reptiles with Calcium production. Cons…very unreliable UVB content and short lifespan. You cannot see the UVB degradation with your eyes so thats tricky. You also need lots of them as these CFL or fluoro bulbs don't spread that well and you need them close.

2. UVB MH lights which are small wattage 70-80W per bulb lights no different than normal MH lights except they are optimized for UVB. These are used by succulent/cacti type growers. The UVA/UVB combo prevents stretching and gives them those vibrant colors. I use these.

3. LED tech still cannot economically produce UVB spectrum. UVA is much cheaper to produce. Just search for pure UVB diodes used by industries. They cost an arm and a leg so if any LED maker claims to have UVB but prices don't reflect it, its definitely a scam!

So what we really want is the UVB. Most UVB bulbs already have lotsa UVA.

I feel that the recent craze with UVA diodes is likely a gimmick. There are research that claims UVA helps improve flavors/terps but I don't believe it will be significant without the UVB combo.

Note: we don't want UVC at all!

Hope it helps!

Hey EQ,

Thanks for the write up. I have been trying to figure this out too. So much theory out there, without real scientific data.

 

[hecno]

Thanks for the reply guys , It is a bit of a tricky one and I will be doing more study on the subject . From what I can gather so far is that UVB is the way to go for around the last 2 weeks of flower .

Found this for $29.95

says 1 to 2 watt is enough for 2 square foot .