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New Lighthouse Lights

Forum to discuss all areas of lighthouse technology such as optics, fuels, fog signals, radiobeacons, daymarks, construction, etc.

Postby island » Fri Jan 16, 2009 12:57 am


In recent years new lights have been developed and are now in use in lighthouses, for lighted buoys and for range lights. Some of these are l.e.d. lights. Others are not. One of the new type range lights or directional lights as they are now called was developed from of all things movie projector optical technology. It is an amazing light.

This site is loaded with infomation about the new lights.
And check out on this site the PEL lights and particularly the Osc light.
http://www.vega.co.nz/
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Postby Grover1 » Fri Jan 16, 2009 3:25 am


THE ORIGINAL LENS FROM BARNEGAT LIGHT

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(Photo/Blacktphoto (John))

THE NEW LENS FROM BARNEGAT LIGHT

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Last edited by Grover1 on Mon Feb 02, 2009 3:25 am, edited 1 time in total.
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Postby island » Fri Jan 16, 2009 7:46 am


I very much perfer the First Order Fresnel compared to that present VRB-25. It appears from the number of bulls-eyes that the light displayed a regular or uniform flash pattern.
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Postby epona » Fri Jan 16, 2009 12:44 pm


It would be interesting to see what the differences are between the new lights such as ones being developed and Fresnel Lights. I would do this but I do not have the technical knowledge that may other people on this board do.

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Postby ron » Fri Jan 16, 2009 1:32 pm


there is not much out there to replace the old fresnel lights but for anything less then five NM, it's hard to beat the new LED's. Most are self contained solar units and far brighter than the old incandecent bulb
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Postby island » Fri Jan 16, 2009 2:08 pm


The LEDs are brighter, last longer and consume far less power. I purchased a Brinkman LED flashlight about three years ago. I has four LED bulbs. It is still as bright as when new and with the two original D-cell batteries.
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Postby Fred » Sat Jan 31, 2009 4:27 pm


One of the nice things about the VRB-25 is using blank panels you can get FL,FL(2),FL(3) etc and with 255 user selected speed covers loads of characters
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Postby island » Sun Feb 01, 2009 10:34 pm


The VRB-25s are great lights. However, USCG Ocean Engineering to reduce the cost of solarization reduced the output intensity of many installations. The lower current demand for both lights and fog signals reduced cost of solar panels and storage batteries. This diminished the effective range of lights and fog signals.

The lens used with the 25s concentate the light beam to somwhat compensate for lower output, This caused a very bright false flash from reflection from the inside surface of the lanten glass. This was fixed by installing anti-reflection curtains within the lantern. These curtains worked but completely (and sadly) eliminated the distinctive loom of the traditional rotating light.
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Postby Terry_Pepper » Tue Feb 03, 2009 9:34 pm


Dave's description of anti-reflection curtains to reduce flashes
reflecting from the lantern glass opposite the observer brings to
mind the VRB-25 installation in the Detour Reef light at southern
entrance to the St. Mary's River. As you will see below, in this
installation the Coast Guard installed black venetian blinds to
eliminate such reflections.

Image

With the Third-and-a-half Order lens being much larger in both
height and girth, the lens itself obscured such reflections from
the back side of the lantern from returning to the observer.
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http://www.gllka.com

Seeing The Light
http://www.terrypepper.com

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Postby johnmark1 » Thu Mar 26, 2009 9:40 pm


Wow, a beautiful lighthouse. It seems to be a romantic.

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