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Thread: Roasting indoors and Fluoro lighting

  1. #1
    hazchem
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    Roasting indoors and Fluoro lighting

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    ok, so I do pretty much all of my roasting inside late in the afternoon or early evening. My car has been kicked to the curb as it were and I roast in my garage under fluoro lighting.

    On a couple of occasions now, when I have roasted during the day it seems to me that when I look at the beans while roasting and while cooling indoors they appear to be, or I perceive them to be darker when I look at them under fluoro lighting than when I look at them in direct sunlight. That is, beans that look like CS10 inside the garage look more like CS8 or 9 in daylight.

    Im pretty certain that this is down to the colour temperature of the fluoro tubes in my garage being too warm (approx 2950 - 3400K) and not close enough to middle of the day sunlight (approx 5400 - 6300K). But maybe Im totally mental and am imagining the whole thing ...

    Anyway, has anyone else that roasts in a similar environment noticed the same thing? Have you changed your fluoros to another type? Maybe Daylight Fluoro at around 5300K?

    Alternatively, is it time for me to call in the men in white coats? *;D ;D

  2. #2
    A_M
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    Re: Roasting indoors and Fluoro lighting

    Quote Originally Posted by 78716A7378757D100 link=1249940161/0#0 date=1249940161
    ok, so I do pretty much all of my roasting inside late in the afternoon or early evening. My car has been kicked to the curb as it were and I roast in my garage under fluoro lighting.

    On a couple of occasions now, when I have roasted during the day it seems to me that when I look at the beans while roasting and while cooling indoors they appear to be, or I perceive them to be darker when I look at them under fluoro lighting than when I look at them in direct sunlight. That is, beans that look like CS10 inside the garage look more like CS8 or 9 in daylight.

    Im pretty certain that this is down to the colour temperature of the fluoro tubes in my garage being too warm (approx 2950 - 3400K) and not close enough to middle of the day sunlight (approx 5400 - 6300K). But maybe Im totally mental and am imagining the whole thing ...

    Anyway, has anyone else that roasts in a similar environment noticed the same thing? Have you changed your fluoros to another type? Maybe Daylight Fluoro at around 5300K?

    Alternatively, is it time for me to call in the men in white coats? *;D ;D

    YES ;D


    You need a good light... I use a lamp to check on mine and my wife wanted me to use one of the new mini fluros.. Not good... A quarts bulb gives a better indicator, however natural light is always best ;)

    What do you do to get rid of teh smoke / fumes ?

  3. #3
    hazchem
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    Re: Roasting indoors and Fluoro lighting

    Quote Originally Posted by 18373E3C2B143837383E3C343C372D590 link=1249940161/1#1 date=1249944976
    A quarts bulb gives a better indicator
    a quartz bulb you say ... basically a halogen lamp I think? Might call into Herkes electrical and have a poke around later in the week and see what they have.

    Quote Originally Posted by 18373E3C2B143837383E3C343C372D590 link=1249940161/1#1 date=1249944976
    What do you do to get rid of teh smoke / fumes ?
    open the garage door. clears out the smoke pretty easy, but I think the garage is going to gain a permanent roasted coffee smell. which is fine with me! ;D

  4. #4
    Senior Member GregWormald's Avatar
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    Re: Roasting indoors and Fluoro lighting

    Even daylight fluoro isnt what you want--right colour but wrong spectrogram to give good colour rendition in brown.

    The classic is of course "filtered daylight"--right colour, right spectrogram, right intensity.

    Any incandescent (if you can find one!) will give better browns and high intensity should be better as long as its not too bright (in theory).

    Greg

  5. #5
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    Re: Roasting indoors and Fluoro lighting

    You just need to look at beans under the same lighting conditions every time (as long as it is basically white light) otherwise different colour temperatures will make them look different.

    If you are comparing them to something (and not relying on memory) the sample will be affected by the light as well.

    Light needs to be bright enough to detect differences in the darker tones.

  6. #6
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    Re: Roasting indoors and Fluoro lighting

    Just go out and buy a spectrometer. You can have one for a lazy 10k. ;D

  7. #7
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    Re: Roasting indoors and Fluoro lighting

    I roast exclusively in my garage during the day and still require a light to shine in the bread pan to check the roast, i was using one of the little LED lights but knocked it and broke it (since when doesnt glass bounce on a concrete floor from 2M ;D)
    I then changed to a 50w dichroic globe and the light is more yellow/orange rather than having a blue tinge from the LED.

    I think the LED is a "cleaner" light if that make sense but its all about perception.

    Also the smoke just goes out the garage door with no issues

    Mal

  8. #8
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    Re: Roasting indoors and Fluoro lighting

    Behmor Coffee Roaster
    Hi,

    Not quite roasting but I am into electronics a bit and way back I built a VK power mate (regulated 13.8V power supply for a CB radio) at night with a florescent light from a fish tank.

    Needless to say it did not work as expected! The next day I when over the board and found the resisters (colour coded values) were all wrong. Under daylight it was obvious nice lesson learnt about colour temperature.

    Brett



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