whats up with cree (corporate)?

[sixstring2112]

better to stand for something than to sit in a pile of shit ,unless you like poo of course

 

[mauricem00]

How are you figuring the par wattage? 49 watts from a 558w lamp would be less than 10% efficient and while I know the new Bridgelux products are better than cheap China lamps I don't think any lamp is as bad as that.

The new Vero products are close to 50% efficient at nominal current. For instance the 3000K 80CRI Vero 29C at nominal is 117 watts, 155 LPW providing 55 radiant watts. At lower currents they will provide well over 50% efficiency.

A fresh T5 is about 5000 lumens, 54 watts = 92 LPW, around 28% efficient. 216 watts of T5HO will provide about 60 radiant watts.

I am taking it from the chart which shows measured radiant power. these are test result from the company. not some theoretical calculation. I provided a copy of the chart on the bridgelux full spectrum and the ebay ad has a chart for the vipersperctra

 

[Dankistino]

better to stand for something than to sit in a pile of shit

The voice of experience

 

[Rahz]

I am taking it from the chart which shows measured radiant power. these are test result from the company. not some theoretical calculation. I provided a copy of the chart on the bridgelux full spectrum and the ebay ad has a chart for the vipersperctra

The chart you attached is a red/blue source and not a white cob. If Fe is the radiant watts (17.222) then the emitter efficiency of that source (100w output I'm assuming) is about 17%.

If you examine the new Bridgelux datasheets you can see the LPW for a particular spectrum and use the spectral data to determine the LPW at 100% efficiency. That can be used to find the electrical efficiency of radiation. It's not just some theoretical calculation. Bridgelux measured both the spectrum and the output. The new 29C is about 47% efficient at nominal current and reasonable temps.

 

[sethimus]

ya you know whats up bigly.
Check out sex tape.

there is a hillary clinton sex tape and you already seen it? u nasty

 

[mauricem00]

The chart you attached is a red/blue source and not a white cob. If Fe is the radiant watts (17.222) then the emitter efficiency of that source (100w output I'm assuming) is about 17%.

If you examine the new Bridgelux datasheets you can see the LPW for a particular spectrum and use the spectral data to determine the LPW at 100% efficiency. That can be used to find the electrical efficiency of radiation. It's not just some theoretical calculation. Bridgelux measured both the spectrum and the output. The new 29C is about 47% efficient at nominal current and reasonable temps.

I can not find lab test on those white leds. I was addressing the cheap Chinese grow lights and not DIY lights.I do know that output and life expectancy ratings for LED light bulbs sold in hardware stores have been lowered to bring them more in line with customer experience and that LEDs have not caught on with consumers or industry so they may be heading down the same road as induction lights.LED makers are their own worst enemy with years of exaggerated claims to overcome

 

[Shugglet]

Consider how fast the competition is moving and cree's price points for comparison.

 

[CobKits]

I can not find lab test on those white leds. I was addressing the cheap Chinese grow lights and not DIY lights.I do know that output and life expectancy ratings for LED light bulbs sold in hardware stores have been lowered to bring them more in line with customer experience and that LEDs have not caught on with consumers or industry so they may be heading down the same road as induction lights.LED makers are their own worst enemy with years of exaggerated claims to overcome

not sure about that, you'll notice that almost all mfrs have similar minimum claims, i believe these are mandated by one of the letter agencies "for our own good". like you need to be at least 14W at 100+ lm/W to call it a "100W replacement". i think all those chips are high quality , and the only difference between a 10 year bulb and a 20 year bulb is how much they invest in heatsinks and its resulting operating temp over its lifetime.

 

[Trippyness]

prices on LED grow lights are in free fall across the board. have you looked at ebay lately? 1000 watt LED grow lights selling for as cheap as $100 http://www.ebay.com/itm/1000W-Double-Chip-LED-Grow-Light-Lamp-Full-Spectrum-for-Medical-Indoor-Plant-Veg/272336364001?_trksid=p2047675.c100005.m1851&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=39855&meid=b44c54eaafc14929b9c58a1943b069bd&pid=100005&rk=1&rkt=6&sd=282016920024

LOL. Thats marketing. Thats not a 1kw light. Lumen output is a tiny 19,000lm

 

[mauricem00]

LOL. Thats marketing. Thats not a 1kw light. Lumen output is a tiny 19,000lm

it contains 100 10 watt diodes. LED grow lights have always been sold this way.false and misleading claims are common with these lights.they are not like other lights that provide accurate information on their power use.I guess they feel if they were honest about their products no one would buy them

 

[Trippyness]

The issue at hand for Cree is the fact that "Other" LED companies are approaching the LPW of Cree's CXB line, yet with a huge price gap. Real life example I just encountered. Vero 29 Gen 7 cost me 35 CAD and a 3590 cost between 80-90 CAD depending on BIN.
Bridgelux will soon catch up as will others. Cree's premium prices will soon come down to where everyone else is I assume. You cannot compete in this market with such a premium price when your product is becoming less premium and more normal in comparison to other LEDs in that product range. If Cree does not either come out with a superior line by a good margin in comparison to others or drop prices to the same range then things wont look so good. They are already not looking great peeking through the Investor report.

 

[Trippyness]

it contains 100 10 watt diodes. LED grow lights have always been sold this way.false and misleading claims are common with these lights.they are not like other lights that provide accurate information on their power use.I guess they feel if they were honest about their products no one would buy them

I am quite away of the bullshit marketing. Alot of new growers dont know jack about LEDs so they buy into the hype and end up with garbage.

 

[mauricem00]

I am quite away of the bullshit marketing. Alot of new growers dont know jack about LEDs so they buy into the hype and end up with garbage.

thats the only reason I waste time on LED threads. trying to provide reliable information to new growers. LEDs are very seductive but don't live up to the claims.the air force and navy tested LED lighting and published some very negative reports on them. like everything else growers need to do their homework

 

[Trippyness]

thats the only reason I waste time on LED threads. trying to provide reliable information to new growers. LEDs are very seductive but don't live up to the claims.the air force and navy tested LED lighting and published some very negative reports on them. like everything else growers need to do their homework

wait...are you saying that LED are bad for growing? I think you are very much mistaken. Even the cheap Mars LED lights do well. The COBS kill HPS hands down.
Watt for watt a COB light will out yield a HPS.
Good to see you trying to inform,, but your information may be a bit off or is there something I am missing?
I have grown some dank under LED and in the middle of upgrading to COBS.

 

[mauricem00]

wait...are you saying that LED are bad for growing? I think you are very much mistaken. Even the cheap Mars LED lights do well. The COBS kill HPS hands down.
Watt for watt a COB light will out yield a HPS.
Good to see you trying to inform,, but your information may be a bit off or is there something I am missing?
I have grown some dank under LED and in the middle of upgrading to COBS.

people grow great weed with CFLs which are more cost effiecient. COBs are DIY projects that are beyond the ability of many.new enhanced spectrum HPS bulbs are available that will outperform standard HPS bulbs and LEC outperform HPS.i'm not saying LEDs will not grow plants. people have grown plants with every form of electric light.I have tried DIY COBs and was not impressed with quality or yield.

 

[sixstring2112]

people grow great weed with CFLs which are more cost effiecient. COBs are DIY projects that are beyond the ability of many.new enhanced spectrum HPS bulbs are available that will outperform standard HPS bulbs and LEC outperform HPS.i'm not saying LEDs will not grow plants. people have grown plants with every form of electric light.I have tried DIY COBs and was not impressed with quality or yield.

Maybe your doing it wrong ?
Gg4 @ day 15


La con @ wk 5

 

[wietefras]

people grow great weed with CFLs which are more cost effiecient.

CFL's are about the worst option you can think off. They have low efficiency to begin with. Then from that meager bit of light it produces, much it gets wasted on the awkward design where the bulb is essentially in the way for the light emitted from other parts of the bulb.

COBs radiate all their light straight towards the plants.

Unless your electricity costs are very low, DIY COBs are a much better option when you consider running costs besides the initial purchase. CFL are the most expensive.

 

[Rahz]

thats the only reason I waste time on LED threads. trying to provide reliable information to new growers. LEDs are very seductive but don't live up to the claims.the air force and navy tested LED lighting and published some very negative reports on them. like everything else growers need to do their homework

It's not fair to lump all LEDs together. There are multiple pre-built cob LED options to choose from.

 

[ichabod crane]

I had some plants under my LED lights. They were very nice looking with good growth up and down the plant. I had them in a room that was 5x7 with 400 watts of LED. I moved three of them out because they were much larger than the other plants and were starting to crowd them out. I placed these 3 plants under 8 T5 HO bulbs in a 2x4 area. So 432 watts of CFL over them. The bottom 8 to 10 inches had all the bottom leaves die.

From this I gather that the CFL lights at higher wattage are better than the LED light covering a larger area.

Some people say the dumbest things.

 

[ReddEyez]

I had some plants under my LED lights. They were very nice looking with good growth up and down the plant. I had them in a room that was 5x7 with 400 watts of LED. I moved three of them out because they were much larger than the other plants and were starting to crowd them out. I placed these 3 plants under 8 T5 HO bulbs in a 2x4 area. So 432 watts of CFL over them. The bottom 8 to 10 inches had all the bottom leaves die.

From this I gather that the CFL lights at higher wattage are better than the LED light covering a larger area.

Some people say the dumbest things.

"Some people say the dumbest things."
I agree...Shhh, dont talk.