The Cadillac of Pendents (A Custom King original)

[georgelc86]

I can just hear all the old textbook pages flipping right now.

 

[kimoyo]

Hey Dom,

Not my place to say. There are a lot of experienced guys with practical knowledge commenting in this thread already. The physics explanations peeked my interest though .

 

[Domboski]

Hey Dom,

Not my place to say. There are a lot of experienced guys with practical knowledge commenting in this thread already. The physics explanations peeked my interest though .

Of course it did! LOL

 

[bueller]

Custom King....SLAMMIN WORK as always!!

 

[Chiefmcfuz]

I don't think there is a question about the quality of the workmanship here, that is top notch which has been stated numerous times. The safety factor for jl and the liability factor for Custom King are the big discussion here. God forbid anything bad were to happen the manufacturer may be held responsible and that could mean a big problem and the fact that there could be a fire well that's a big factor for jlaudio.

Quality of craftsmanship is not the question here at all and let us not make it one. Safety and Liability is.

 

[bueller]

agreed

 

[Awibrandy]

I've been following this thread not saying anything since I paid no attention what so ever to my physics & chemistry teachers. I hated those two classes. My interest were elsewhere those days.
But I do have a question; Wouldn't anything made of resin also melt, warp, or burn if placed on top of a MH fixture?

 

[Awibrandy]

But I do have a question; Wouldn't anything made of resin also melt, warp, or burn if placed on top of a MH fixture?

Since my previous question was not answered I will ask it another way.

What is the difference between Resin & Acrylic? To me they are both of a plastic substance. Yeah, I can be stupid at times.:tongue1:

 

[georgelc86]

I believe resin has a different melting point Awi

 

[Awibrandy]

I believe resin has a different melting point Awi

Thank you georgelc86, would resin melt faster or slower?

 

[NYreefNoob]

slower, they also make a fire proof resin
Fire Retardant Laminating Resin

This laminating resin is a flame retardant resin that is formulated and complies with the test requirements of several agency flame specifications. This resin is prepromoted and thix for room temperature gel and cure with MEKP. Its’ features include low viscosity, non-draining and good wetting. MEKP catalyst sold separately.


http://www.fiberglasswarehouse.com/polyester_resin.asp

 

[Awibrandy]

I don't think that any of the resins in your link was used to make my angels Rick.

You see after reading this thread I've become concerned because I have for the past year and eight months my Angel Figurines have been sitting directly on my Hamilton triple 175 watt MH and duo 140 watt VHO fixture. There has been no effect on the figurines to date and my VHO's run 11hrs. and the MH run for 5hrs.
Have I just been lucky?
Or am I to understand that the acrylic resin used to make these figurines is a better material then the acrylic used to build these expensive sumps?

 

[NYreefNoob]

awi the thing the guys are pointing out is the fact the some how a retro kit is attached to the acrylic cover, whether its hung or bolted to it, the heat will rise and eventually warp or melt, the figurines sitting on top of your fixture have something blocking most of the heat, top of the fixture is warm at most, so unless he has a fan blowing air between the fixture and the actually retro he could end up having a problem, whether it happens fast or slowly the weight of the retro pulls loose from the cover

 

[georgelc86]

Hey Awi, I think your figurines maybe be mixed with ceramic also. Thus they absorb heat much better. Just a guess. Also if your figurines are sitting on top of a metal fixture, that metal is dissipating the heat too. BTW your dogs are awesome.

 

[NYPDFrogman]

Won't the heat from the halide melt the acrylic?

YES
I've done my fair share of acrylic work I dont think I would use acrylic for a light hood
I stay away from canal street they usually sell imported no name acrylic


here is the link for msds acrylite GP (assuming that it's made of cast,)
this pretty much says it all
http://www.cyro.com/methacrylates/M...-E3CF88BD70AE/0/1235EGPPhysicalProperties.pdf
Components made of ACRYLITE GP sheet should not be exposed
to high heat sources such as high wattage incandescent lamps, unless the finished
product is ventilated to permit the dissipation of heat.ACRYLITE GP sheet is a combustible thermoplastic. Precautions should be taken to protect
the material from flames and high heat sources.

ACRYLITE GP sheet usually burns rapidly
to completion if not extinguished. The products of combustion, if sufficient air is present, are
carbon dioxide and water. However, in many fires sufficient air will not be available and toxic
carbon monoxide will be formed, as it is from other combustible materials.We urge good
judgement in the use of this versatile material and recommend that building codes be
followed carefully to ensure it is used properly.
this is copied from Phillips website regarding MH bulbs

WARNING:The arc-tube of metal halide lamps are designed to operate under high
pressure and at temperatures up to 1000?C and can unexpectedly rupture due to
internal or external factors such as a ballast failure or misapplication. If the arc-tube
ruptures for any reason, the outer bulb may break and pieces of extremely hot
glass might be discharged into the surrounding environment. If such a rupture were
to happen,THERE IS A RISK OF PERSONAL INJURY, PROPERTY DAMAGE,
BURNS AND FIRE.

I'd have to agree with Russ's assessment, and his aggressive approach

 

[Awibrandy]

Hey Awi, I think your figurines maybe be mixed with ceramic also. Thus they absorb heat much better. Just a guess. Also if your figurines are sitting on top of a metal fixture, that metal is dissipating the heat too. BTW your dogs are awesome.

Thank you georgelc86! On both the dogs and the explination on my figurines. I can now rest assure that my angels will not be a puddle on top of my light fixture.

Rick, don't do that! I raised 4 children and now I have two little ones to care for again. I am confused enough as it is.LOL Your post had to be read a couple of times to decipher what you were trying to say to me....:tongue1:

 

[masterswimmer]

Frank, great information. Thanks for doing the legwork and putting that post together.

I hope JL has taken all the warnings to heart and reconsidered using the acrylic housing for MH bulbs. It looks pretty, but so does a gingerbread house. I wouldn't live in one though.

swimmer

 

[JLAudio]

Frank, great information. Thanks for doing the legwork and putting that post together.

I hope JL has taken all the warnings to heart and reconsidered using the acrylic housing for MH bulbs. It looks pretty, but so does a gingerbread house. I wouldn't live in one though.

swimmer

I definitly am listening and questioning my light. Its currently working really well and am conflicted with all the great advice of you guys and the other professional involved. I am a bit confused and frustrated because of multiple issues in this situation. I really appreciate all of the advice and have looked at it every day for any signs of melting/cracking etc. So far it looks really good. The designer of it told me if I wanted my old pendent back he would trade it back no questions asked, but I am trusting that this will work.

Overall I am hoping that all works out and that all of this is just some concerned reaction to a new technology. But I really appreciate all your help and Jeff great craftsman ship

 

[JHOV2324]

wow reading this thread makes me feel like im in school

Mayb Custom King can incorporate some of these heat fixes into his design and make it flawless

 

[NYPDFrogman]

Acrylic has it's uses but not in this application

I wouldn't hesitate to use it with florescent lighting
using it in conjunction with MH is an accident waiting to happen\
melting and cracking isnt the issue acrylic is combustible