Search results

nope...

No helmet ? Not a full body suit ? Testing a drag bike on a pavement ? Oh my Gawd ! .....I've always thought that us, greeks ,are the most stupid bike riders .... ^^^Biker is dead long time ago ... ^^^ He's dead ,too (from what I'm aware of .Some say he ain't )

What comes in mind is a kind of analogous debate ... Electric motors vs internal combustion engines .... "Tesla cars do not meet the audio levels ,required for a decent sports car " .... No vrooooom ,no speed.... :wall::wall::wall::wall::wall: OMG ,what else I'm gonna be reading in this...

" led grows do not meet temperature and humidity levels required for a decent grow " .... :lol::lol::lol::lol::lol: That was a good one ....

Inside the zip folder you will find a short vid ... I used an old anodised heat sink ( Alloy 1060 ) and a HSS 4 mm drill bit ... With my left hand i'm holding my lousy cell phone ,recording the vid ... With my right hand I'm turning the lever ,lowering the bit towards the heat sink surface ...

I use a bench drill @ 620rpm.No lubricant of any kind and ordinary High Speed Steel drill bits (HSS) and usually I start easy with pressure and keep increasing pressure until the hole is done ... Never had an issue .But the heat sinks I'm using are made of soft 1060 or 1050 alloys...

Aka the easiest 400 Euros made in one night ... Forced him to break down his cue at round #16 .. Dam' I'm good ... :P

Well ....Do we have a new player here ? http://www.led-professional.com/products/led-driver-ics-modules/uel240b-a1z-226515-kv-surge-immunity-3-in-1-dimming-function http://www.fuhua-cn.com/en/ http://www.fuhua-cn.com/en/product/LEDdianyuan_huna_/LEDhengliudianyuan/list_85_2.html...

Yeap..I've already read about it ....Here : http://www.led-professional.com/technology/light-generation/plessey-builds-leds-in-cubic-gan-on-3c-sic-si-to-overcome-the-green-gap Cheers. :peace:

Depends what kind of reflection is needed ... Specular is not good for plant growing .... Diffusive,yes " it's the shit " ... Now,have to go ...Got to break some aramiths ...

I'm sorry guys have to leave you now ... A friend came and we 've some " issues " to resolve between us .... On the carom table ....I need some money ,he,he,he ... ( Have I mentioned before that I'm a fanatic carom player ? Ok ,I'm not Filipos Kasidokostas,but i'm pretty good at 3-cushion ...

Trust me ,the side walls -in case of reflective ones- mostly reflect the " stray " photons back to the leaf canopy ... The biggest losses are to be found in the ...floor (and pots ,soil ,etc ) ... An example ... Enclose only the "above ground" parts of a plant in a reflective environment ...

BTW photons move down from the lamp. It's not like they randomly bounce around a lot. They don't generally miss the bud and then hit the wall. It's the fraction of light that comes in at such a shallow angle that it needs a bounce to even get close to the buds. Well said.:hump: Cheers. :peace:

Why the sky is blue ? Why in cloudy weather ,you can get ...500 shades of grey ? Why sky at dawn is red ? Why the sky at dusk is purple ? Sunlight diffusion ...(ok and absorption too ...)

(...) that inverse square law doesn't really apply in grow tents/rooms with reflective walls(...) Of course it applies ! But it's way complex -even for advanced software/hardware - to exacty calculate the energy(or power if you prefer ) levels at a " x,y,z" point somewhere inside the...

Lasers do spread out( aka diffuse ) ,no matter how much parallel the beam is focused ... There's a pretty good reason ,that professional cutting lasers are made in the Infra Red region and not being blue ones or violets or even green ones ... The light of lasers is coherent . And trully...

Quickies ... 1 ) There's no such thing as "penetration" ... Photons / energy packets / quanta either get ABSORBED or REFLECTED or TRANSMITTED . So ,clarify me one thing :When-any of you- refer to penetration ,what exactly do you mean ? The amount of light that reaches the lowest parts of the...

A simple comparison : Program Versatility : Digitals win this round .They can be programmed with 1' steps -usually- and can be programmed in a wide range of settings . Wear off : Again digital timers win this round .No moving parts to wear off . Mechanicals use motor ,few wheels and gears and...

Legrand's OmniRex. That is the most reliable timer I've ever used ... and trust me ,I've used many (: always plug-in timers ,never used rail or wallbox timers ) , during more than 15 years of growing ... Still,ain't the perfect timer ,as it's time counting accuracy it's hold by the mains...

Abstract: A growing number of evidence shows that plants benefit from a presence of green light in a spectrum of a light source. Green light is transmitted through plants' organs and is efficiently utilized in deeper layers of cells and in intracanopy leaves. Green diodes are sometimes used in...