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Author Topic: Desk Lamp for Print Viewing  (Read 1004 times)

Fred Salamon

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Desk Lamp for Print Viewing
« on: September 27, 2017, 07:48:28 PM »

I have searched the forums and read the various threads on a light source for viewing prints.

The consensus seems to be Solux, unfortunately I have not been able to find a desk lamp that will work with a Solux bulb.

Track lighting systems are not an option. 

Among the newer LED options such as Sorra and Lumicrest is there a recommended/preferred option?

I am looking for a bulb that will fit into a standard desk lamp, something like a Par20 with an E26 base.

Can the folks who have tried some of the LED's offer any advice?

Currently the largest prints I make are 17x22, recommendations for light source to print distance, beam angle etc would be welcome.



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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #1 on: September 27, 2017, 08:29:32 PM »

Tailored Lighting in Rochester NY has lamps that accommodate Solux bulbs. You can also use an Ott Light. They should be available at local hardware stores.
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Mark D Segal (formerly MarkDS)
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jrsforums

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Re: Desk Lamp for Print Viewing
« Reply #2 on: September 27, 2017, 08:45:25 PM »

Tailored Lighting in Rochester NY has lamps that accommodate Solux bulbs. You can also use an Ott Light. They should be available at local hardware stores.

In the USA, Jo-Ann Fabrics has many varieties on Ottlite, often on sale..
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John

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Re: Desk Lamp for Print Viewing
« Reply #3 on: September 28, 2017, 07:27:44 AM »

You also asked about viewing distance and angle. It's hard to say in abstract or statistically. But think of it this way. Suppose you had a group of people in your living room and you wanted to show them your prints. You set up the desk light, bring in the prints, and you'd want them to be viewed at a distance from the lamp whereby they are fully lit, but not too bright and not to dim - comfortable on the eyes. Whatever that distance, it is the correct distance. For beam angle, it matters more for gloss and luster papers. You don't want them viewing hot spots and glare, so the correct viewing angle is the one that shows the image to its fullest, absent as much of this spurious reflectance as possible. Whatever viewing angle that requires is the correct one.
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Mark D Segal (formerly MarkDS)
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digitaldog

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Re: Desk Lamp for Print Viewing
« Reply #4 on: September 28, 2017, 10:43:52 AM »

If you examine the SPD of both an Ottlite and a Solux, you'll never put the two in the same sentence again.  ;D
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Andrew Rodney
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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #5 on: September 28, 2017, 10:56:23 AM »

If you examine the SPD of both an Ottlite and a Solux, you'll never put the two in the same sentence again.  ;D

I use Solux, a track of them; but I also have an Ottlite as it comes in handy periodically. Are you suggesting an Ottlite should not be used for critical print viewing? Not SPD for a moment, but OTT claims their bulbs produce 5000K lighting. Solux has bulbs in the 4700-5000K range. I couldn't find any SPD data for OTT; the SPD page for Solux isn't very intelligible. Regardless, do you not think either of them would be preferred over other kinds of lighting in terms of providing simulated daylight viewing conditions?
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Mark D Segal (formerly MarkDS)
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digitaldog

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Re: Desk Lamp for Print Viewing
« Reply #6 on: September 28, 2017, 10:58:09 AM »

Are you suggesting an Ottlite should not be used for critical print viewing?
With some workflows, papers (with OBA's) yes.
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Andrew Rodney
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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #7 on: September 28, 2017, 11:01:34 AM »

With some workflows, papers (with OBA's) yes.

Explain?
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Mark D Segal (formerly MarkDS)
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digitaldog

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Re: Desk Lamp for Print Viewing
« Reply #8 on: September 28, 2017, 11:04:03 AM »

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Andrew Rodney
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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #9 on: September 28, 2017, 11:16:05 AM »

You know the effects of OBA's and the illuminant used.
http://digitaldog.net/files/15TheRightLightpart1.pdf

Yes I know what OBAs do and your article is relevant, but it doesn't explain how an OTT light reacts badly with papers containing these fluorescing agents. Do you know the SPD for OTT lights and what aspects of that data cause the problem for viewing papers with OBAs?
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Mark D Segal (formerly MarkDS)
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digitaldog

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Re: Desk Lamp for Print Viewing
« Reply #10 on: September 28, 2017, 11:36:35 AM »

Yes I know what OBAs do and your article is relevant, but it doesn't explain how an OTT light reacts badly with papers containing these fluorescing agents. Do you know the SPD for OTT lights and what aspects of that data cause the problem for viewing papers with OBAs?
YES!
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Andrew Rodney
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digitaldog

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Andrew Rodney
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Doug Gray

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Re: Desk Lamp for Print Viewing
« Reply #12 on: September 28, 2017, 01:04:29 PM »

http://www.solux.net/cgi-bin/tlistore/infopages/Ott-lite.html

I concur re Ott-lite.  I bought a desktop one years ago and was surprised the spectrum was so spikey. There are much better fluorescent or LED lamps these days that better approaches Solux which is the gold standard.

Do you know what the uV levels of Ott-lites are these days?

I don't recall my old Ott-lite uV levels. Most other "daylight," non-Solux  lamps I've checked in the last few years have almost no uV, ranging from 25% of M1 (D50 uV levels) to well under 10%.  That's one of the reasons my default profiles are M2 (uV cut).
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Czornyj

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Re: Desk Lamp for Print Viewing
« Reply #13 on: September 28, 2017, 01:10:48 PM »

For over a year I'm using high CRI Yuji E27 light bulbs (6 and 10W) - they're decent, convenient, robust, stable and power efficient. Much better than OTT CCFL, less problematic than Solux.

datro

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Re: Desk Lamp for Print Viewing
« Reply #14 on: September 28, 2017, 02:00:53 PM »

+1 on the high CRI Yuji LED lamps.  They are the best LED bulbs I've found anywhere.  The R9 value is around 95, and the overall SPD is incredibly even. It's all due to their interesting remote phospher design.   My only complaint is that there is a very slight delay at turn-on before it lights (and some delay in obtaining them since they have to come from Yuji directly in China).

Dave
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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #16 on: September 28, 2017, 04:30:11 PM »

http://www.solux.net/cgi-bin/tlistore/infopages/Ott-lite.html

Thanks Andrew; this would indicate that OTT advertising may be somewhat lacking in specifics or misleading. I didn't find anything on their website rebutting these comments from Solux, except for the rather general claim that their bulb simulates daylight. Good to know.
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Mark D Segal (formerly MarkDS)
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paulster

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Re: Desk Lamp for Print Viewing
« Reply #17 on: September 28, 2017, 05:03:38 PM »

On a related note, is anyone aware of any desk lamps that take an MR16 bulb, so could thereby be retrofitted with a Solux?
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MazenHam

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Re: Desk Lamp for Print Viewing
« Reply #18 on: September 29, 2017, 12:13:40 PM »

Tailored Lighting in Rochester NY has lamps that accommodate Solux bulbs. You can also use an Ott Light. They should be available at local hardware stores.

Tailored Lighting offer a Color-proofing kit with 4 light beams. I'm also planning to use almost the same size prints, but in addition I might have Panos at 48x16 max. 4 seems like a lot of beams, but I have no experience in this at all, so do I get 2 for example ?

planning to use their 36 degree MR-16 50W bulbs on track fixtures to be able to move each further/closer to the print. thinking of dropping 2 4-inch tracks from ceiling. Do you think that could work out fine ? 

Thanks
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Mark D Segal

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Re: Desk Lamp for Print Viewing
« Reply #19 on: September 29, 2017, 01:22:52 PM »

2 should be good enough to fully illuminate a 17*22 inch print from about 4 or 5 feet away. Larger than that, more bulbs. I have a track with six on it, but seldom make effective use of more than two for print viewing.
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Mark D Segal (formerly MarkDS)
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