Does incandescent light have an effect on fermenting wort? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Does incandescent light have an effect on fermenting wort?

Reply
 
Thread Tools
Old 11-16-2010, 03:45 PM   #1
velorider11
Recipes 
 
Oct 2010
PA, PA
Posts: 76
Liked 3 Times on 3 Posts



Hi, all. Just wonedering if anyone knows the effect that incandescent light will have on fermenting wort. I ferment in a glass car boy that gets no daylight but there are incandescent bulbs lit in the area often. Thanks



 
Reply With Quote
Old 11-16-2010, 03:56 PM   #2
devilishprune
Recipes 
 
Mar 2010
Posts: 1,241
Liked 9 Times on 9 Posts


Almost any light can skunk beer. I'm pretty sure that even incandescent puts out some amount of UV light, which is what you don't want. If you're worried about it, throw a t-shirt on that bad boy and call it a day.



 
Reply With Quote
Old 11-16-2010, 03:57 PM   #3
krops13
Recipes 
 
Aug 2009
SoCal
Posts: 270
Liked 2 Times on 2 Posts


I just guessing here, I don't think incandescent light [B]often[B] is enough to bother it. But I think a good place to start looking is what wave length of sunlight skunks up hops, then see how similar the wave length of incandescent light has.
__________________
Quote:
Originally Posted by passedpawn View Post
Rdwhahb&dbad!
Translation: Relax don't worry have a home brew and don't be a ****!
Quote:
Originally Posted by Jdecarol View Post
Oh the things I would do to that pint.
California Common Pint

 
Reply With Quote
Old 11-16-2010, 04:10 PM   #4
Walker
I use secondaries. :p
HBT_LIFETIMESUPPORTER.png
 
Walker's Avatar
Recipes 
 
Sep 2005
Cary, NC
Posts: 10,987
Liked 101 Times on 89 Posts


incandescent light won't hurt your beer. it's UV light that causes the skunking of hops, so you should avoid sunlight and flourescents, but an incandescent bulb won't harm it.

I use a homemade heater to control my ferm temps in the winter because my ferm fridge is in the garage and drops below ale yeast range. That heater is just a thermostat that turns on a 40W lightbulb. I've been using it for years now, and there has never been any issue.

edit: *if* an incandescent bulb emits UV, it appears to not be enough to cause any problems based on my yearly experiences in the winter with this heater sitting right next to my glass carboys in the fridge in the garage.
__________________
Ground Fault Brewing Co.

 
Reply With Quote
Old 11-16-2010, 05:18 PM   #5
Jawbox0
HBT_SUPPORTER.png
Recipes 
 
Dec 2009
Debary, Florida
Posts: 456
Liked 25 Times on 21 Posts


Why not just throw a TShirt on it, then you have no worries whatsoever

 
Reply With Quote
Old 11-16-2010, 06:37 PM   #6
conpewter
HBT_SUPPORTER.png
 
conpewter's Avatar
Recipes 
 
Nov 2007
East Dundee, Illinois
Posts: 5,106
Liked 53 Times on 48 Posts


Incandescent bulbs don't generally put out enough energy below 440 nm to be of concern. I ferment without anything on the fermenters, but most of mine are in the freezer or in a cabinet. If I had it out in a room where the light was on all the time I'd probably throw a shirt over it, but wouldn't really be necessary unless you have fluorescent lights.
__________________
"People should not be afraid of their governments. Governments should be afraid of their people." - V

Primary: Nothin
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash

 
Reply With Quote
Old 11-17-2010, 05:14 PM   #7
malkore
 
malkore's Avatar
Recipes 
 
Jun 2007
Nebraska
Posts: 6,922
Liked 37 Times on 35 Posts


Quote:
Originally Posted by conpewter View Post
Incandescent bulbs don't generally put out enough energy below 440 nm to be of concern. I ferment without anything on the fermenters, but most of mine are in the freezer or in a cabinet. If I had it out in a room where the light was on all the time I'd probably throw a shirt over it, but wouldn't really be necessary unless you have fluorescent lights.
This. normal incandescents don't throw enough UV to matter. They're better at producing heat than light anyhow.

Screw-in fluorescents and all standard fluorescents as well as halogen bulbs DO throw enough UV to matter (store lights skunk heiniken bottles...)

LED's do not produce UV light either.
__________________
Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10

 
Reply With Quote
Old 11-17-2010, 06:14 PM   #8
jmferris
Recipes 
 
Sep 2010
San Tan Valley, Arizona
Posts: 149
Liked 1 Times on 1 Posts


Even though I keep my carboys in a low-light area (until I can keep them in the darkness in what hopefully will be a winter fermentation chamber build), I find that a large bath towel wraps around a 6.5 gallon carboy nicely. Just tuck the top corner in behind itself where it meets and it allows me to quickly take a peek if I am so inclined.
__________________
Coming off of a year long brewing hiatus.

Fermenting: Empty
Conditioning: Empty
Consuming: Water
On Deck: TBD

Brewing Blog: http://microbrewology.snaploop.com | Follow Me on Twitter @josephmferris

 
Reply With Quote
Old 12-13-2010, 11:44 PM   #9
dlandryqb
Recipes 
 
Dec 2010
new haven, ct
Posts: 4

Hello All - So my apartment here in CT is kept at about 60 degrees. Too cold for ale brewing. So, while my beer is fermenting in the glass carboy, it is wrapped in a dark blue towel and some Christmas lights (better than a tree!). The lights penetrate the towel somewhat, but only very dimly. Would this have the potential to alter the taste of my ale, or would the fact that the lights are a) incandescent and b) very dim prevent any real off flavors? Anyone that has direct experience please let me know what you think...I won't know for sure until 3 weeks from now and want to rest assured that I'm ok. Thanks!

 
Reply With Quote
Old 09-06-2011, 02:07 AM   #10
Julohan
HBT_LIFETIMESUPPORTER.png
 
Julohan's Avatar
Recipes 
 
Apr 2009
Posts: 977
Liked 2 Times on 2 Posts


A store I work at has fluorescents lights in the beer cooler. The front beers are always skunked. So what I have read is, if the lights were switched to incandescent or LED bulbs, the beer would be perfectly fine.



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Taking Fermenting Wort and putting it into New Wort bierzwinski Fermentation & Yeast 16 11-13-2012 12:18 AM
One Effect of Underpitching permo Fermentation & Yeast 4 09-10-2010 05:35 PM
What effect will this have? Gilbey Fermentation & Yeast 6 06-04-2010 03:31 PM
Can I use bottom fermenting yeast with a beer kit that comes with top fermenting yeas kcusmc Fermentation & Yeast 4 03-16-2010 07:07 PM
UV Rays from incandescent bulb? Sea Fermentation & Yeast 5 12-11-2009 02:38 PM


Forum Jump