LEDs lighting

[skullface]

anyone tried those leds lighting? Any idea where to get one from?(one thats equal to a 1000HPS would be great )

[Spurious]

Important performance specifications to consider when searching for light emitting diodes (LED) include LED type, peak wavelength, viewing angle, optical power output, luminous intensity, forward current, and forward voltage. LED types include infrared, red, orange, yellow, green, blue, white, and ultraviolet. Peak wavelength is the desired output wavelength of LED. Dependent upon diffusion from the lens, usually the larger the viewing angle, the less bright the LED. Diffused types generally have larger viewing angles and non-diffused types have smaller viewing angles. The optical power output of the LED is expressed in mW. The luminous intensity of the LED is expressed in mcd. The candela (cd) is the luminous intensity of a light source producing light at a wavelength of 555.17 nm with a power of 1/683 watt per steradian, or 18.3988 milliwatts over a complete sphere centered at the light source.

 

LEDs are available in red, orange, amber, yellow, green, blue and white. Blue and white LEDs are much more expensive than the other colours.

The colour of an LED is determined by the semiconductor material, not by the colouring of the 'package' (the plastic body). LEDs of all colours are available in uncoloured packages which may be diffused (milky) or clear (often described as 'water clear'). The coloured packages are also available as diffused (the standard type) or transparent.

 

 

3200K Warm Incandescent-White LEDs and LED Lamps Bring Warmth To Solid-State Lighting

 

TORRANCE, CA-November 14, 2003 - LEDtronics® announces a complete line of 3200K (Kelvin) Warm Incandescent-White LEDs (Light Emitting Diodes) and LED Lamps in a variety of LED configurations, sizes, dispersion angles, packages and standard electrical bases. These 3200K White LEDs emit a warm incandescent-white light that makes them excellent replacements for standard incandescent lighting. Architects, entertainment designers and other lighting professionals will find that LEDs 100,000-hour life spans make LEDs ideal solutions for maintenance-intensive and ornamental lighting applications. LEDtronics offers 3200K LED lamps in many sizes ranging from 3mm midget flange all the way up to 3.75-inch R30-style spotlights. What's more, standard electrical bases enable LED lamps to be integrated into existing wiring systems without requiring modifications. Bases available are candelabra, 25mm Edison screw, 15mm bayonet, wedge and flange. Also, 3200K Warm Incandescent-White LED come in a variety of panel mount lamps and discrete (3mm, 5mm and SMT) LED packages. LEDtronics Warm Incandescent-White LED lamps are available in all standard domestic and international voltages.

 

Solid-state construction renders LEDs impervious to electrical and mechanical shocks, vibrations, frequent switchings and environmental extremes. LED lamps perform well in applications subjected to voltage dips or surges. Integrated current-limited resistors and polarity-protection diodes assure that no circuit modifications are required. Additionally, with the use of multiple LEDs, an LED cluster lamp continues to provide light even if one or more emitters fail unlike when the filament breaks in an incandescent bulb.

 

With an average life span of 100,000-plus hours (11 years), LEDs operate year-after-year making them ideal illuminators for applications that require a reliable light source. LED lamps use only 10% - 20% of the energy consumed by equivalent incandescent lamps, and when combined with their maintenance-free operation results in substantial cost savings.

 

Founded in 1983, LEDtronics® leads where others only follow when it comes to designing manufacturing and packaging state-of-the-art LEDs to meet the world's constantly changing lighting needs. Our inventive product line encompasses an array of direct incandescent lamp replacement Based LEDs, low-cost snap-in and relampable Panel Mount LEDs, high intensity sunlight-visible Discrete LEDs, PCB LEDs circuit board status indicators, suifae mount diodes SMT LEDs, full-spectrum rainbow RGB LEDs and Infra-Red (IR) LEDs.

 

Prices for 3200K Warm Incandescent-White LEDs and Bulbs range from $2.00 - $198.00 each in quantity of 100 depending on the number of LEDs and lamp models. Availability is stock to 4 - 6 weeks for special requirements. For qualified customers, samples are available to meet your design requirements. For additional information on how to incorporate 3200K White LEDs into your product designs, contact LEDtronics toll free at 1-800-579-4875, telephone 310-534-1505, fax at 310-534-1424, e-mail at webmaster@ledtronics.com or mail at LEDtronics Inc., 23105 Kashiwa Court, Torrance, CA 90505. Visit our website at www.ledtronics.com.

 

http://news.thomasnet.com/images/medium/2003/11/28490.jpg

[WantDaChronic]

the usa is using LED's in street signs all over the place...i seen a special about them on discovery science that started off about the billboards and how easy they are to maintain, repair and how cheap they are to run, then went on to saying how LEDs are going to be used by NASA to grow plants in space....

 

the biggest problem they have in space with growing plants at the moment is getting the roots to take hold and for the plants to grow upright.....mainly because they cannot generate a constant form of gravity :thumbdown but i was thinking if they made the whole room spin around the walls would start to generate bit of gravity (centrefuge type of thing and im too stoned to worry about spelling ) and if they had some hps lighting on rails in the centre of the room they could grow that way....

 

but im stoned, have barely any idea of what im going on about and ive said my 2 cents, peace :smoke

[jackfrost]

have seen alot of traffic speed signs in sydney with red LED lights.

 

I suppose they would be good to grow in the fact that you could direct each led to a different part of the plant - so no light wastage could be had - also min heat - but generally sounds like a pain in the arse in the long run - I think a small HID would be a lot less hassle.

 

Carnt really comment though, as ive never used one.

 

Jack

[mrenergie]

anyone tried those leds lighting? Any idea where to get one from?(one thats equal to a 1000HPS would be great )

<{POST_SNAPBACK}>

 

 

hello all.

i an developing a LED grow system. i already made some panels and tested them in my growbox. i've seen yome interest at this forum, so i decided to tell you my oppinion.

leds are good for growing. i made a test: sunlight vs. led. the results were amazing. the plants under leds looked much healthyer than those under the sunlight. i am now trying to change the powersuply for leds from 11,5 V DC to 11,5 V AC voltage. with that i will just improve my already good setup. there are two reasons i decided to do that. first i'll reduce the amount of power (it is already very small), and second: i read at OG, that flashing light is good for plants.

if you are interested, i can report results of my experiment when it is done. for start, take a look at my previous panel of leds. it costed me arround 100$ and few hours of handwork. i used it at DC voltage, now i am going to put one extra string between those on the picture, change the polarity (of extra string), and attach it to 11,5 V AC voltage.

pict: http://img37.imageshack.us/img37/3999/imag00873du.jpg

 

peace

[Gush]

if you are interested, i can report results of my experiment when it is done

I for one, am very interested.

Do you know the usage/output compared to HPS?

Post on my friend... :thumbsup

[Gnobbish]

I'd be interested to learn about the ratio of blue to red light (and the dominant wavelengths of each LED) that seem to foster growth. Been playing around with LEDs and they're hella_easy to rig up and you can buy them cheap in bulk. Cool idea. Nice pic, too.