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UV gels |
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freeytrap 
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Joined: 18 May 2007 Location: chester Status: Offline Points: 313 |
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 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 |
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tweeter box
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Joined: 21 October 2007 Location: United Kingdom Status: Offline Points: 6784 |
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Posted: 15 December 2009 at 3:47pm |
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super-hero
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Joined: 29 March 2005 Location: Middlesex Status: Offline Points: 2094 |
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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.
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I'm not an animal, I'm a human being.
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Nigey-C
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Joined: 06 February 2006 Location: Grimsby... FISH Status: Offline Points: 1342 |
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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... |
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csg
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Joined: 17 September 2007 Location: bedford Status: Offline Points: 6085 |
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Posted: 23 December 2009 at 12:10pm |
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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...
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norty303
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Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8800 |
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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?
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My laser stuff: Frikkin Lasers
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freeytrap
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Joined: 18 May 2007 Location: chester Status: Offline Points: 313 |
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Posted: 24 December 2009 at 11:47am |
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this is the prederseser of the uv i have
i will get a pic up soon
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james folkes
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Joined: 08 January 2005 Location: United Kingdom Status: Offline Points: 3064 |
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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.
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mardy hippy.
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freeytrap
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Joined: 18 May 2007 Location: chester Status: Offline Points: 313 |
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Posted: 25 December 2009 at 6:06pm |
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james folkes
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Joined: 08 January 2005 Location: United Kingdom Status: Offline Points: 3064 |
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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 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.
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mardy hippy.
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backlash
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Joined: 11 November 2008 Location: Devon Status: Offline Points: 3532 |
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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!  Edited by backlash - 26 December 2009 at 3:08pm |
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norty303
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Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8800 |
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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.
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My laser stuff: Frikkin Lasers
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