This was recommended to me for the Erica Synths Megarack, so I bought two thinking the high price would be warranted by the quality. First impressions were that they were very heavy and looked well built. All was well till I plugged them into the sockets atop my Megarack case. They seemed to work, but weren't throwing a great deal of light out. On closer inspection not all the LED's were lit. I contacted Littlite and they said the lamps were probably not receiving enough voltage. Not the fault of the lamp, but very annoying. The second problem is the lack of an on/off button the lamps. The lamps are on day and night because they can't be switched off during the day. I ended up getting frustrated with them and removing them altogether. Unfortunately I had a stroke around this time so I was unable to return them, so I'm now stuck with two expensive but unusable lamps. In summary, the lamps are NOT compatible with the Megarack, and the lack of an on/off button at this price bracket is for me, unforgivable.