Solved Question about damage to blacklight when exposed to UV light

September 23, 2016 at 19:56:52
Specs: Windows 7 pro, qx9650/8gb
I was shining my black light all over my desktop and would like to know if anyone knows if it will cause damage or degradation of any kind to the case.

I was shining it for a few minutes.


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September 24, 2016 at 02:40:28
It will have done no harm at all.

Your case or anything else would have to be exposed to UV light for several weeks before it showed any signs of colour fading.

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September 24, 2016 at 04:48:57
Yeah, but even if it was exposed to the uv it must have done something, no?

Thanks phil22

message edited by ckso2266

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September 24, 2016 at 08:51:06
✔ Best Answer
I've yet to see any evidence of damage from UV to computer cases etc...

However... (prolonged) exposure to your eye is another matter...; and just about all current led displays push out a degree of the stuff... lcd devices pushed out slightly less but it was there.

Most led displays are defaulted to a very high colour temp display - pushing out serious "blue white"... The human eye has difficulty in coping with this.. and tires of it. Long term effects are not pleasant. It is wise (I suggest) to reduce the colour temperature of any led display significantly; to in effect make it warmer to view. Also reduce the brightness too - as invariably it's defaulted to a "rather high" brightness level..

LED tvs are even worse as they invariably come out of the box set with atrocious settings for colour, contrast, and brightness. Very view viewers knowhow to set up a tv correctly; both to actually view the picture and see "all that's is meant to be seen" and also reduce eyestrain...

Plasma/tft screens were far less damaging to view; and the old glass box/CRT even easier on the eye; but again both of these needed to be correctly adjusted... And sadly in most domestic situations - they weren't....

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September 24, 2016 at 09:28:27
Wow, i did not know that about led tv's. Thanks for your insight trvlr.

message edited by ckso2266

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September 24, 2016 at 10:22:58
Quick set up guide...

If the menu allows a "warmer" setting -use it. It reduces the blue content, and after a stort while you won't be aware of the change - most aren't really aware at all immediately after they make the change.

(Also apply this to any computer display, as you will find eye strain lessens; and also adjust brightness/contrast too...)

Via menu settings, reduce colour/saturation to zero; i.e. turn off the colour so picture is no black and white. If, and occasionally this happens, you can't reduce colour to zero, at least take it down as low as possoble.

Next reduce contrast to zero. Ideall the screen will now be blank... At the least the display will be significantly less...

Access the brightness setting. increase it if the screen is dark. Then reduce it until the screen is just about to go black, and leave it at that setting. If there is a picture on the screen because the contrast won't turn off fully, then observing an area of the picture that is "supposed" to be black, adjust brightness so that it is "just" black - i.e. any lower setting on brightness would lose that information, and any increase would mean i's not quite black.

Access contrast control, slowly increase it watching ares on the screen that are in effct "peak white"; ideally looking for small areas that are almost spikes.. Increase contrast slowly until the white areas (spikes) seem to be over bright - usually apper to defocus slightly. Reduce contrast to just below that setting.

Return to brightness and recheck setting for any area you know to be black... adjusting if necessary.

Then access colour, and increase to setting that your eyes find comfortable. A guideline is to watch true reds and blues as you increase colour setting. Watch to ensure that the setting does not exceed that point where the colour/chroma setting is too high, and red/blue coloured areas will seem to be noisey, glaring etc. Reduce to below that setting.

Save settings and exit.

Ideally make these adjustment from a typical viewing distance/position, as the further away you view a tv display the lower the brightness will appear to be; meaning you will not see details in the lower regions of the picture...

In broadcasting we use a test signal and meter to make contrast settings; brightness is by eye and ideally from the viewing distance, As we also have colour bars available we can use those to set colour/chroma level rather than by eye.

With practice one can match several monitors and some decent tv sets quite closely by eye, using the routine above; using a meter allows it more accurately and also even those with less than ideal colour vision can set them up too... (alhough actual fine(r) colour matching may still elude them...) I used to have perfect or impossibly near perfect colour vision; not sure it is nowadays.

Many tv sets have very limited adjustments available; the more you pay the more you usually have... But knowing what they are and how to use them is by no means clearly provided.

I have yet to visit any home (or any store) and see a set properly adjusted, be it even in black and white days...; with exception os friends in SLC who had a techy team come in with suitable kit and make the required tweaks.

Be aware that each of us sees a colour picture differently; some will feel it's too bright/contrasty or too the other way.

And the colour settiing is very personal; but if the settings are made as above they will generally work for most viwers.

message edited by trvlr

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