Hey guys so im looking into a cheap but effective way to have great plant growth for less the cost so im looking into leds i have found the following Brand: Diyuan Product Code: CHIP1P-D Availability: In Stock Price: R6.00 Qty: - OR - Add to Wish List Add to Compare 0 reviews | Write a review More Sharing ServicesShareShare on emailShare on printShare on facebookShare on twitter DescriptionReviews (0)Related Products (8) This is a SMD LED chip (30mil), and is suitable for various LED lighting applications/projects/etc. Can be used to make your own custom LED lighting, or to replace the faulty LED chip in your existing LED light. These chips are used in a variety of LED downlights and LED lighting. Specifications: Voltage : 3.3 -3.5 Power : 1watt Colour : white (6000 ~ 7000K) Lumens : 80~90 Angle : 120 degrees LED Chip : 30mil SMD Chip Brand: Diyuan Dimensions : ~ 8mm x 8mm x 5mm (excluding tabs) Lifespan: 50,000 hours and want to know if i get 10 of these what would i need to drive it and what would the cost and would i get good grouth @sub-lime youve done this, could it work? some advice would be great
Depending on the QTY you would want to use, you would need a LED Driver. They have a few (3) types of drivers available on their site as well. The 10W driver is more than likely overkill for that specific LED, so look at the 3W ones.
Hi there here is a link to someone that has done it so maybe you can learn from him Maybe you do not need so much light but can go smaller, here is the link :- http://www.tropicalaquarium.co.za/showthread.php?18205-DIY-180w-15000Lumen-LED-Lighting
Hey @Quue, il be happy to help out. What size tank is this going into and what is the depth of the tank. These 1w are decent and will work However it will be a lot of soldering work to get enough lighting for a high tech setup. Also remember that 6000-7000k primarily has a green wavelength in it which is not a required wavelength for plant growth/photosynthesis. It is more for visual appeal for us. You will need a mix of 630-700 and 430-480nm which make up the 2 primary parts for photosynthesis. (Chlorophyll A and B). So do a mix of 70% 6500k to 1 blue and red led or your tank will look like a 80' disco. Lol ps do not look into those 1w led's they are ridiculously bright. Need more info? Just ask
Pity the website doesn't provide much more technical data. To buy an LED for R6- and then get a separate driver for the LED @R39- makes no sense at all (besides the driver is rated for 3W) I am pretty sure these LED can be wired in series (say 4 in series) and that various banks (of 4) can then be connected in parallel and a normal 12V DC power supply be used to supply the juice. It appears that the 4LED module is just that, 4 LEDs in one package which can be driven by a 12V module (the 12V-10W module offered at R85- (which can however drive about 6-7 of 4LED wired in parallel). @sub-lime -you got your hardware from a source which does supply to the general public. Can you at least provide us with the technical data for the Leds and driver used. I believe you had a 36V driver and 3V (or 3.3V) LEDs, so for each driver you probably connected 11-12 LED in series, right?
@ JCL I am pretty sure these LED can be wired in series (say 4 in series) and that various banks (of 4) can then be connected in parallel and a normal 12V DC power supply be used to supply the juice - No since most power supply's are not constant current. 460nm 1w led 680nm 1w led 30w led 6500k led chip 1x 30w chips powered by 30w led driver (220v AC input to 34v/30w 650ma Constant Current) 10x 1w led's powered by 18w led driver (220v AC input to 18v/18w 300ma Constant Current)
@sub-lime In my post I lamented the lack of details found on the suppliers websites. While the preferred driver for LEDs would be a constant current source as it has (at least in theory) advantages over a constant voltage source, I do not want to be locked into 'manufacturers' solution' which will cost me unnecessary money. I will do some investigations in the next month or two and do my own testing and report back on the forum. I would however like to point out some inaccuracies in your data. You wrote "1x 30w chips powered by 30w led driver (220v AC input to 34v/30w 650ma Constant Current)" -please note that this driver will only supply 20Watts max. If the driver supplies 30 to 34Volts and 650mA constant current, it will provide 19.5 to 20.15 Watt (first value is based on 30V, second on 34V) This is a fact, no doubt about it. DC power is calculated by multiplying Voltage with Current. So the so called 30W turns out to be about 2/3 of that(19.5-20.15). It would still look like pretty bright light and us humans would not be able to look at it and guess-timate the power without measurement. In the second case you mention, the 10W example, the driver will only supply 18V x 0.3A =5.4W, not 10W. So again, the real figure is far off the quoted figure (54%). Trust me here, I am an electrical engineer (graduated 35years ago) and in my time built 'stuff' from 9V DC circuits to 110kV 3phase high voltage overhead lines. I don't believe all the marketing data supplied by the manufacturers as I have found that a lot is simply 'hype' rather than substance (just look at the ridiculously high music power values quoted on boom boxes, no relevance to RMS power)
Here is an interesting article for the technically minded ones, (or those suffering from insomnia, this might help) Amperor: Power by Design - Preview Page Many more articles on the net, ...so go and knock yourself out -Lol
@JCL, Not doubting you, but unfortunately you will need to stick with manufacturers figures unless you are going to build your own driver, diodes or stick with brands like Kessil... You asked me for technical specs listed on my items, i gave them too you as per what i had received. The math does not work out as i understand it would need 46v @ 650ma to make 30w, either way it powers my 30w led chip perfectly. The Driver does run at a 60% duty cycle so probably why it runs at +-20W - i would say this is to prolong its lifespan.
10x 1w led's powered by 18w led driver (220v AC input to 36v/18w 300ma Constant Current) - fixed. i see i have 18v/18w 36v should make 23w @.65A but hey above is the specs..
@sub-lime -there are numerous laws in electrical engineering, like Ohm's law, Kirchhof's law, etc. These laws have been expressed in formulae and like physical laws (for example Newton's law) do always apply. Manufacturers' data sheets are quoted figures and pretty much like car manufacturers' fuel consumption figures, are often found to be very optimistic. I am not trying to take anything away from your LED lighting system, however the electrical laws applied to the data you provided paint a different figure than those quoted. You are however correct in your statement that with these drivers (the ones for which the data was provided), the LEDs are not being driven to their maximum and as such their life expectancy should be even greater. On the other hand, if I buy a 30W LED and driver, I expect to get exactly that and not 20W which may last me 80000 hrs in lieu of 50000 hrs. On life expectancy, ... a few other factors come into play as well, like the temperature the LEDs are running at, which is influenced by the ambient temperature as well as the cooling system used. But back to this thread again. I will have another look at the website listed in the beginning of this thread and see whether any combination of LEDs and driver would be a 'match made in heaven' ....Lol Will report back if I'll find such a pair.
@JCL, These laws have been expressed in formulae and like physical laws (for example Newton's law) do always apply - I do completely agree. I do understand that i am not running the systems to its full potential but i do prefer the longevity of the system; especially since most of the led's and drivers used are not top quality like Cree and most of the users on here do not have budgets to purchase these or most would just buy a professional unit. The key here is cheap and effective as well as simple enough for more avid DIY'ers to follow. To put it into perspective there is a led build on here which is +- 130w which was a DIY project of just over R3000; i built a 188w (Capable) unit running @ 128w with 90mm convection cooling for R1500.
