2.7umol/J

[banke1]

Has anyone seen or used this light? Seems impressive....

http://www.pllight.com/products/fixtures/hortiled-top/

 

[canadian1969]

MSRP?

 

[Stephenj37826]

MSRP?

1600 320 watts.

 

[BM9AGS]

1600 320 watts.

What's the umol/j of the QB at 50w? 90w?

 

[Plant Lobbyist]

What's the umol/j of the QB at 50w? 90w?

Probably pretty high. Lower you go for power, the better the umol/j will be. Even lower quality chips can reach high levels if driven low enough.

 

[Plant Lobbyist]

So help me out here. Would you not take the 2.7umol/j times the 320 system watts for a PPF of 864. Not a PPFD of 864.

They are irrespective of one another. PPF is instantaneous power of the light source (photon count) whereas PPFD is photon density landing over an area. The two are equal in numbers when the light distribution covers a 1m2 area.

PPF is good for planning, but it is PPFD that matters.

 

[Stephenj37826]

What's the umol/j of the QB at 50w? 90w?

@50 watts ~ 2.4umol/j depending on the driver.

 

[canadian1969]

1600 320 watts.

So $5 a watt

@Stephenj37826
Whats the price per watt for 5 QB's at 50 watts? ie 350 watts of QB vs 320 watts of the light above. If there is a 12% diff in umol/j then the little extra wattage should prob even that out.

 

[Stephenj37826]

So $5 a watt

@Stephenj37826
Whats the price per watt for 5 QB's at 50 watts? ie 350 watts of QB vs 320 watts of the light above. If there is a 12% diff in umol/j then the little extra wattage should prob even that out.

Cost would be around $550 if you used the slate 1 heatsink which isn't really necessary at 50 watts. Also the light mentioned above is mono red/blue for greenhouse supplement only. They have different color combos. The white light version is 2.2 umol/j

 

[UKpeanuts]

How do the values above relate to the 2.4umols/j your talking about?

 

[Rahz]

The T4-725 using 3000K 90CRI emitters is 4.7 umol/j... price is less than half that 1600. Granted, the output wattage of the T4 comes in just under 300 rather than 320 but still.

 

[Rahz]

How do the values above relate to the 2.4umols/j your talking about?

Those numbers are 100% efficiency, i.e. 1 watt of light. If the emitter output is 50% for example then you would multiply the values in the table by .5 and find the emitted umol/j. It will be a bit lower once you factor in the power supply efficiency, fans, fan PS.

 

[Hybridway]

The T4-725 using 3000K 90CRI emitters is 4.7 umol/j... price is less than half that 1600. Granted, the output wattage of the T4 comes in just under 300 rather than 320 but still.

Really? Damn. Good job making something for sale that efficient, & w/ 90CRI. Wow!

 

[Hybridway]

Maybe he meant dimmed. 4.7 is crazy.

 

[CobKits]

no he meant that spectrum is 4.7@ 100% efficacy

 

[xX_BHMC_Xx]

How do the values above relate to the 2.4umols/j your talking about?

@CobKits these numbers get multiplied by the efficiency of the chip to get actual PPF numbers right? According to Alesh's excel sheet my CLU038s are at about 4.7 as well.

 

[CobKits]

yes those numbers in the table are purely spectral

 

[xX_BHMC_Xx]

yes those numbers in the table are purely spectral

Thanks again!

 

[Rahz]

no he meant that spectrum is 4.7@ 100% efficacy

Should have been 2.7 based on 280 LER and 5 QER. Sorry for the screw up.

 

[MeGaKiLlErMaN]

I'll stick with the 2.8-2.97 from chilled LED