I think Cree have a nice future. Their SiC expertise itself is a solid value. Cree had lost share value in the last year, but its more related to a previous high value than any other cause, i believe. Investors searched for companies well positioned in the LED market, due to the high expectation about this market future growth. After the concentration process in the LED market, and with all the mayor lighting manufacturers buying and investing in the LED field, CREE has remained as the only mayor LED manufacturer wich isnt supported by a mayor lighting company.
Cree has a different strategy than other LED manufacturers, and possibly investors prefer the "guarantee" of companies having good distributors channels and integration capabilities. Cree dont make light fixtures or any finished product, they only want to be a leader manufacturer of components and raw materials. They dont want to enter in the marketing war, by not selling directly to the public, because they want to concentrate only in being a leader in the LED's manufacturing procces. IMHO, its a good strategy, at least for the moment.
The problem with share values of this companies is they are more affected by future expectations than to current company results. After the loss in the last year, i think Cree is currently a nice investment target, always you are thinking in the long term. Companies in sectors with quick growth, as LEDs, have a very speculative component, causing large fluctuations of value in the short term.