I think it has more to do with the IceCap endcaps trapping the heat of the VHO and less to do with the ballast itself ... I have VHO's and one of my endcaps showed signs of melting and as a result I have not run them in a little while ... regular " tombstones " endcaps would prolly be fine with any ballast as they are open to dissapate the heat.
Cheers
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Steve
“The most important decision you make is to be in a good mood.”
― Voltaire
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