Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 11-09-2011, 11:03   #31
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,778
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Colour of Light for Best Night Vision

Quote:
Originally Posted by Trekka View Post
One advantage I have found to using red in the summer months is that it attracts far less bugs than other colors. And more critters are willing to keep their eyes wide open watching you and thus reveal their presence.


havent found bugs in the deep blue sea as yet.... so that is best for on shore or in a marina. rarely i find bugs in an anchorage , and nearly never at sea--just one misguided bee in gulf of mexico..
__________________

zeehag is online now   Reply With Quote
Old 11-09-2011, 11:11   #32
Registered User
 
webejammin's Avatar

Join Date: Mar 2011
Location: Pacific NW, sailing the Columbia River, USA
Boat: Gemini 105MC 34 ft hull#753
Posts: 951
Images: 3
Re: Colour of Light for Best Night Vision

Our cockpit light has both red and white led's in one fixture with a reostat to dim the light to almost nothing and only uses .02 watts.
__________________

__________________
Wind in my hair and a nice catamaran
Phil & Elaine
webejammin is offline   Reply With Quote
Old 11-09-2011, 11:15   #33
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,778
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Colour of Light for Best Night Vision

i use absolutely zero additional lighting in cockpit on passages--only the nasty white dimmed gps illumination.
my only interior light used in passages is my glow of pale yellow that has a cloth over top to reduce glare to nothing. works perfectly in long passages off shore where there is no ambient light other than stars, moon and darkness of sky--perfect place to be ..
zeehag is online now   Reply With Quote
Old 11-09-2011, 11:40   #34
CF Adviser
 
Bash's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
Quote:
Originally Posted by zeehag
i use absolutely zero additional lighting in cockpit on passages--only the nasty white dimmed gps illumination.
my only interior light used in passages is my glow of pale yellow that has a cloth over top to reduce glare to nothing. works perfectly in long passages off shore where there is no ambient light other than stars, moon and darkness of sky--perfect place to be ..
you might want to consult the owner's manual for your gps. Most nav gear made for the marine market has an option for a night palette.
__________________
cruising is entirely about showing up--in boat shoes.
Bash is offline   Reply With Quote
Old 11-09-2011, 11:53   #35
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Re: Colour of Light for Best Night Vision

From what I read ages ago, red closes down the pupil less than higher frequency light for the same apparent brightness. Isn't closing down the pupil less for a given amount of brightness what you would want?
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 11-09-2011, 12:30   #36
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,778
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Colour of Light for Best Night Vision

Quote:
Originally Posted by Bash View Post
you might want to consult the owner's manual for your gps. Most nav gear made for the marine market has an option for a night palette.
is turned down to min...is just a whiter lite than i am used to using.
when i look far out i need to cover it so i can see in darkness better.
is garmin 498.
zeehag is online now   Reply With Quote
Old 11-09-2011, 13:49   #37
Registered User

Join Date: Dec 2008
Location: ontario canada
Boat: grampian 26
Posts: 1,743
Re: Colour of Light for Best Night Vision

Night vision goggles. Problem solved.
__________________
perchance is offline   Reply With Quote
Old 11-09-2011, 13:49   #38
Registered User
 
Lars_L's Avatar

Join Date: Jul 2011
Location: Boat: West coast of Norway Winter: Höllviken, Skåne, Sweden
Boat: H 30
Posts: 156
Re: Colour of Light for Best Night Vision

A instrument of any kind, speed, log, deep sounder and even monochrome radar, shall have dimmable red light if they shall be used during night and you want to preserve your night vision. If you want to use instruments were colour are essential, for example chart plotters, do best to dedicate one person (who will ruin its night vision) to do this works.

There were several heavy texts Grod have links to (#8). They say that there are tree types of cons, and those cones that are sensitive for red is the absolutely most common. If red doesn’t close down the pupil as much as other colours, that would also contribute to the favour of red.

As noelex say, rods can’t see details. Do a test by have the frontpage of a newspaper in front of you. Pot the focus beside the paper (more than 15°) and try to read. For my self, I can’t read even the biggest signs. The rods are they who beside focus and are most sensitive to blue-green and can’t see colour. The only time blue-green is usable are in cabin to be able to orientate your self. In my boat, which is quite narrow (2.5 m / 8.3 feet), I have seldom problem with the orientation.

A more serious problem is what colour shall I have on the buoy rescue light (ore similar equipment)? White has all colours and is most used today. But there is limited capacity in the batteries and you want it to light as long as possible. In other words, the light should use as little power as possible. When you have thrown rescue buoy and whit that the lamp, it takes a period of time before you are back to that place. During that time the distance to the light have been quite big and the light have dimmed a lot. Way use the limited power on all colours when you only see the blue-green? Its good if it flashes because the rods are more sensitive to changes, and it saves energy.
__________________

__________________
Lars_L is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:34.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.