I had 2 that were a different size than any other DE bulb, slightly longer, and wouldn't fit in a none adjustable socket so I returned them. I had one left which I used in a Ice Cap 250/400 pendant and adjusted the sockets so it would fit. I ran them on a new IceCap 250 HQI ballest and the bulb burnt out in around 3 months. :( So, in my opinion they suck balls in quality, fit, and light output but that is just my opinion based on my experience with the 250W 14K DE bulbs I purchased. I would just save your money and by a better bulb. Hope this help!
Also, I thought IceCap went out of business??