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Advice on Lights melting/cracking Soundproofing Glass?


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#1 Keenetoscope

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Posted 18 October 2010 - 11:48 PM

Hi,

We were lighting a recording studio for a Live Off The Floor Shoot for an indie band and unfortunately, the lights seemed to have melted / cracked the soundproof glass in front of where the lights were placed. Has anyone experienced this situation before or would know what happened?

We had two cheap construction work lights facing into the recording area about a hand away from the double paned soundproof glass. Two cracks appeared in the glass in front of the work lights, cracking from the inside of the closest pane not on the side closest to the light. Over the course of the shoot, they spread but eventually stopped. We had two Lowels 500w about maybe 13" away from smaller panes. Only one pane started to crack and immediately all the lights were struck. The lights were turned on for about 10-30 minutes max. We didn't know what else to do so the cracks were gaff-taped up and we kept shooting with flourescents.

*We're film students. We've talked to our professor but he has never heard of this situation before. Could someone please advise us on what happened? What could we have done to prevent it?

Thank you.
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#2 John Sprung

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Posted 19 October 2010 - 12:05 AM

About a hand away is way too close. A yard would be more like it. Or, put the lights on the other side of the glass. Rule of thumb, if it's not comfortable for your hand, it's not safe for glass or most any everyday objects.





-- J.S.
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