UV gels
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Category: Other Chat
Forum Name: Lighting Talk
Forum Description: All your lampy, laser and 'other' special FX needs....
URL: https://forum.speakerplans.com/forum_posts.asp?TID=32961
Printed Date: 26 March 2026 at 7:09pm
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Topic: UV gels
Posted By: super-hero
Subject: UV gels
Date Posted: 22 November 2009 at 8:54pm
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Where can I get some UV gels.
I want to turn some par cans into UV par cans.
Is this as simple as adding a UV gel. ------------- I'm not an animal, I'm a human being. |
Replies:
Posted By: ceharden
Date Posted: 22 November 2009 at 9:11pm
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Incandescent bulbs emit very little UV light so no, it won't work well. You can get a gel which is a similar colour to what UV looks like on white but it won't be UV light coming out of it. You need a proper UV light source. |
Posted By: fuzzylogic
Date Posted: 22 November 2009 at 9:17pm
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does work a bit,I put a load of UV gels over the lights in my van for the festi season to great effect lit up the backdrops fine.Dunno about a larger scale though,UV cannon is what you need. ------------- NEIGHBOURHOOD SOUNDSYSTEM Infinitely baffled. |
Posted By: super-hero
Date Posted: 22 November 2009 at 9:38pm
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Thanks for the replys.
I have UV cannons and some UV strip lights, but just wanted a few more options for hire outs.
I also have some outdoor floodlights fitted with sodium lamps, do they emit any UV. or do I just need to buy more cannons.
Cheers. ------------- I'm not an animal, I'm a human being. |
Posted By: freeytrap
Date Posted: 22 November 2009 at 9:46pm
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not with the sodium bulb in but if you swap it for a metal halide you will get a high enough couler tempratur to produce uv make shure you get a compatable bulb that will run with the origanal sodium balest and starter i no you can get them for 250w version not looked for outhers |
Posted By: super-hero
Date Posted: 22 November 2009 at 10:07pm
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I also have a couple of floods with metal hallide lamps fitted, but they are only 70w and 150w versions.
The next question is where can I get some UV gels from. ------------- I'm not an animal, I'm a human being. |
Posted By: tallmike
Date Posted: 22 November 2009 at 10:55pm
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the amount of other light that a UV gel would have to absorb would mean that they wouldn't last long at all!
Go UV LED....
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Posted By: super-hero
Date Posted: 22 November 2009 at 10:59pm
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Cheers Mike.
Been looking at UV Led, but they seem to put out more visible light than a UV cannon, so you don't get the total darkness effect that you can get with cannons. ------------- I'm not an animal, I'm a human being. |
Posted By: jonminns
Date Posted: 22 November 2009 at 11:10pm
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There is no way of reproducing the effect of a cannon/tube Therefore you need to put up with purple light or use the real deal ------------- 4 ohms is for wimps |
Posted By: tallmike
Date Posted: 22 November 2009 at 11:17pm
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get the cannons or floods. every bugger and his dog makes 'em.
UV's getting more popular again, no?
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Posted By: Ben_Lawrance
Date Posted: 23 November 2009 at 12:26am
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Lee 181 - Congo Blue has the closest wavelength transmission.
However, because it is very deep, you need a massive source behind it to get anything through it. This then means more heat, concentrated very heavily, and the gel burns out very quickly.
My record is 19 minutes with 2KW behind it.
Get real UV - It's the only way.
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Posted By: super-hero
Date Posted: 23 November 2009 at 5:56pm
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Cheers guys.
I knew the gel idea was too good to be true. ------------- I'm not an animal, I'm a human being. |
Posted By: freeytrap
Date Posted: 15 December 2009 at 12:25pm
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my 600w uv has a filter on it and has never burnt through mind you the filter is 4-5mm thick and the light has 2 12cm fans on it the fiting was origanly made for checking engin blocks at vauxals i will try and get some picks up i also have a 35w pin spot uv used origanly for checking spray boths |
Posted By: tweeter box
Date Posted: 15 December 2009 at 3:47pm
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http://cgi.ebay.co.uk/GLOW-in-the-dark-POWDER-4-gel-Candles-nail-art-GBA_W0QQitemZ120502671671QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1c0e84d937 -
Percy check this out;
http://cgi.ebay.co.uk/GLOW-in-the-dark-POWDER-4-gel-Candles-nail-art-GBA_W0QQitemZ120502671671QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item1c0e84d937 ------------- PRECISION SOUND SYSTEM. Feeding the peoples needs for Roots Music. Strictly premium grade reggae and dub steppers from the early 70's to present day. |
Posted By: super-hero
Date Posted: 15 December 2009 at 8:05pm
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I think that's just the paint that glows when you shine a uv light on it.
Not to worry about the UV filters now, as I have given up on that particular route. I will just use normal coloured jels for the lights.
And as someone said, I will just have to buy more UV lights.
Thanks again everyone. ------------- I'm not an animal, I'm a human being. |
Posted By: Nigey-C
Date Posted: 23 December 2009 at 6:15am
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get yaself some of these... http://prolight.co.uk/item/ledj66?PHPSESSID=874eefd2d7276541e77b97f7f461925d got 10 in hire stock atm.... very low power usage for hig output... well worth the buy... still got the UV cannons, but these make it out on more hire jobs as theyre lighter and dont cost so much when a bulb goes... |
Posted By: csg
Date Posted: 23 December 2009 at 12:10pm
| have you experienced any power fade on these yet - the life on uv led's is still much shorter than normal leds. im starting to see plenty of normal led fixtures suffering badly from fade - not the everlasting lightsource we were promised... |
Posted By: norty303
Date Posted: 23 December 2009 at 12:24pm
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nigey, you say high output... everything I've read about those UV Led fixtures has suggested that they don't cut it versus regular UV fixtures. Can you quantify how they compare, say with a 4ft tube with reflector and a 400w UV cannon? ------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers |
Posted By: freeytrap
Date Posted: 24 December 2009 at 11:47am
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this is the prederseser of the uv i have
http://www.interflux.de/wEnglisch/shop/csv/Angebot.shtml - http://www.interflux.de/wEnglisch/shop/csv/Angebot.shtml
http://www.interflux.de/wEnglisch/shop/csv/Angebot.shtml - http://www.interflux.de/wEnglisch/shop/csv/Angebot.shtml
i will get a pic up soon
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Posted By: james folkes
Date Posted: 25 December 2009 at 3:18pm
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i can testify that freeytrap's interflux lamp is possibly the brightest uv source i have ever seen... it also gives you vicious sun-burn, not to be used without some consideration. it is the type that uses a discharge lamp that puts out a crap load of uv alongside some visible light and then filters out the visible stuff, so the right filter can take out quite a lot of light energy. i have a chauvet 250 watt uv that works like this, it's a teeny bit lame, not terrible, but lame. possibly the nicest fitting freeytrap and i have ever come across was a "nocturn" unit. ip rated and dmx controllable it is clearly the daddy of uv theatrical lighting, a friend in the south of france inherited one and it just blew us away. beautifully built, very, very bright and with almost no visible spectrum, it was classy, but it's hard to find anything out about it on t'interweb. as i gather, nocturn was a specialist arm of xenotech-strong international entertainment lighting founded in 1998 to do specifically uv stuff, maybe there just wasn't the demand to sustain it. james. ------------- mardy hippy. |
Posted By: freeytrap
Date Posted: 25 December 2009 at 6:06pm
http://www.icdevices.com/hmi.html - http://www.icdevices.com/hmi.html  |
Posted By: james folkes
Date Posted: 26 December 2009 at 12:05am
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oh well done, that is indeed they. hmi lamp i see, certainly explains why it was bright. i can't remember off the top off my head but hygrarium medium-arc-length iodide - as i once learnt hmi stands for - has one of the highest lumen outputs for watts input of any discharge lighting. hygrarium being the old school name for mercury, so it's basically a hard-line mercury vapour lamp and similar to those used for moonlight shooting in the movie industry. i have played with a 6kw hmi working on a film and it was impressively bright, i remember doing the maths and working out it was equivalent to about 36,000 watts of tungsten incandescent lighting. arri, the german company responsible for the unit, also make http://www.arri.de/lighting/europe_asia_australia_africa/daylight_lampheads/arrimax/arrimax_1812.html - this rather pleasing 18 kw device, so that's something like the light output of 108,000 watts of conventional tungsten lighting from one bulb. mental... james. ------------- mardy hippy. |
Posted By: backlash
Date Posted: 26 December 2009 at 3:06pm
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I am sure - and we are talking years ago now - found some rosco UV gel - as has been said it doesn't cause white or UV paint to 'glow' very well but used on stage created an amazing scene.
It was used during a production of godspell at the Northcott theatre in Exeter - a youth dramatic production where the lighting/sound/backstage crew were young'uns too! We were guided by the theatres tech crew and stage management team, even costumes dept had members of the youth group. Anyway, we had 4 8Kwatt lanterns hanging on Lx bars towards the cyc backwashing the stage - when the interval came we had these 4 lanterns on 80% ish with these rosco gel in them, and it gave just about enough light to light a silhouette of cast members spelling out interval with their bodies. Very good show by all accounts! 
You can see one of the 4 in this picture as they were used the majority of the 1st act to give a dull murky wash at all times, the lantern on the left!  ------------- According to suicide statistics, Monday is the favored day for self-destruction. http://www.truesoundhire.co.uk/" rel="nofollow - Sound Hire |
Posted By: norty303
Date Posted: 26 December 2009 at 4:06pm
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It's probably worth noting that moving fixtures that use hmi lamps tend to have uv filters to stop the uv rays getting out of the case and causing harm. Most have safety warnings about striking the lamps with the casing open because of the danger to eyes. Something to bear in mind before shining these sources on people rather than inanimate objects. ------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers |
Posted By: csg
Date Posted: 26 December 2009 at 9:19pm
Here you go James, this is my team of electricians using several arri 18k hmi fresnels used to create the moonlight shafts for the RSC / BBC production of hamlet which was on TV this afternoon - back in june
they are used for far more than just moonlight - being 5600 - 6000 kelvin light temperature, the colour of north sunlight, they are used extensively for daylight balanced filming inside and out.
fine bits of kit, one of these with a woods glass lens would be a mental uv source!
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james folkes wrote:Posted By: Sinfinity
Date Posted: 27 December 2009 at 7:25am
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Chris, what where the gelled par cans for? Just to warm the shot up a bit or something else?
------------- Matt at ukamp dot co dot uk |
Posted By: csg
Date Posted: 27 December 2009 at 10:43am
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those and if you look carefully the atomic strobe were used to simulate firework bursts in one of the earlier scenes
we also had several 5kw halogen fresnels and 2 more atomics inside for doing the same thing
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Posted By: Sinfinity
Date Posted: 27 December 2009 at 11:11am
A thousand and one uses for a strobe  Thanks for the information. Cheers Matt ------------- Matt at ukamp dot co dot uk |
Posted By: james folkes
Date Posted: 27 December 2009 at 11:15am
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aye, that is they. proper kit, beautiful things aren't they! very light for quite how large they are too. i quite enjoyed my little job as a best boy, but i wasn't quite up for slavishly devoting myself in the manner required to break into the industry. shame really, it was right up my street. james. ------------- mardy hippy. |