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Author Topic: Light bars  (Read 388 times)

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Offline jamespetts

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Light bars
« on: February 15, 2020, 01:45:58 AM »
I saw on the Hattons video that the new light bars have arrived, although I do not see them as available anywhere online.

Apprently, there are now three types: (1) yellow; (2) warm white; and (3) cool white. This is a happy development, the warm white especially being useful for late 20th century modellers.
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Offline monkey_brains

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Re: Light bars
« Reply #1 on: March 01, 2020, 12:17:45 PM »
Very good news - due shortly I believe

The old ones have become that scarce prices have got a bit silly
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Offline jamespetts

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Re: Light bars
« Reply #2 on: March 28, 2020, 05:27:33 PM »
I have now taken delivery of a batch of these in warm white. This is what one looks like fitted to a mk. 3 TGS:

Dapol mk. 3 TGS with Dapol light bar by James Petts, on Flickr

I thought that this was a little too bright and not quite high enough in colour temperature, so I fitted a theatrical gel (Rosco E-Colour+ no. 204, full C. T. orange) and the result looked like this:

Dapol mk. 3 TGS with Dapol light bar by James Petts, on Flickr

Here is a comparison with a carriage without the gel:

Dapol light bars in Dapol mk. 3 carriages by James Petts, on Flickr

Dapol light bars in Dapol mk. 3 carriages by James Petts, on Flickr

As to which is the better colour, this is more complex than at first appears because colour is highly contextual: the brain effectively has a sort of auto white balance function that changes the perception of colour depending on the surroundings to try to parse the colour of light reflected from objects in a normalised sort of way.

Daylight is circa 5,500k. The sort of fleorescent lights that would have been in railway carriages in the 1980s would have been circa 3,000k. A tungsten fillament bulb is circa 2,700k. Here are some examples of night photographs of lit railway carriage interiors in the late 1980s for comparison:

Late Night TPO At York. by Neil Harvey 156, on Flickr

43107 Leeds by British Rail 1980s and 1990s, on Flickr

E43088 - York by Syd Young, on Flickr

Vulcan At Manchester Victoria. by Neil Harvey 156, on Flickr

York Nocturne by Syd Young, on Flickr

Night-time Newspaper Empties At Manchester Victoria. by Neil Harvey 156, on Flickr

50048, Exeter St.Davids by Jason Rodhouse, on Flickr

307120 307122 Leeds by British Rail 1980s and 1990s, on Flickr

The locomotive cabs, I am suspecting, would still have had tungsten lights at this time, especially in the older classes such as 47s (the HST may have had a fleurorescent light in the cab - but I do not think that there are any HST cab light pictures in this set).

Here is a useful video showing trains running at night in this era:



As can be seen, the apparent colours are very variable. The video suggests that the original Dapol colours may be better than the gelled example. I should be grateful for people's views (or any better calibrated pictures/videos).

I also notice that these have a strong tendency to flicker, so I may have to consider connecting the whole train electrically together.

Edit: Cleaning the wheels makes a big difference to the flickering.
« Last Edit: March 28, 2020, 05:44:01 PM by jamespetts »
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Offline jamespetts

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Re: Light bars
« Reply #3 on: March 29, 2020, 02:01:48 AM »
Here are some more pictures with lower ambient light:

Lit carriages by James Petts, on Flickr

Lit carriages by night by James Petts, on Flickr
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Offline dannyboy

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Re: Light bars
« Reply #4 on: March 29, 2020, 12:31:01 PM »
Personally, I prefer the Dapol lighting. Well, that is what my brain is telling me.  ;)
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Offline jamespetts

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Re: Light bars
« Reply #5 on: March 29, 2020, 01:07:58 PM »
Personally, I prefer the Dapol lighting. Well, that is what my brain is telling me.  ;)

I think that that is probably right - Dapol seem to have got the colour right for this.
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Offline jamespetts

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Re: Light bars
« Reply #6 on: March 29, 2020, 03:49:13 PM »
Placing another order for these for the rest of my HSTs and 121s, I notice that these seem to be selling out very fast, especially in the warm white colour.
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Offline honestjudge

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Re: Light bars
« Reply #7 on: March 30, 2020, 11:38:11 AM »
Do these flicker on motion or have Dapol got around this?

Offline jamespetts

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Re: Light bars
« Reply #8 on: March 30, 2020, 12:42:23 PM »
Do these flicker on motion or have Dapol got around this?

They can flicker, but cleaning the wheels and track helps greatly.
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