UV radiation from Metal Halide Bulbs

[sperry]

Why do people use the Double-Ended HQI Metal Halide Bulbs if you have to be so careful about UV radiation and using a shield? It seem the single ended bulbs would be safer and less of a hassle. Is there an advantage to double over single ended?

 

[joeycadre]

i love my single ended bulbs after using a double ended pendant for a few months last year.
almost everything bleeched under that thing. ugggh.