Advanced LED makes a switchable LED system, but it's out of your price range. I've got some great info on E.shine systems, they claim to be the manufacturer of the Advanced LED systems - but are selling their product for much cheaper.
Remember, these are unverified reports coming from the manufacturer - but E.shine systems have been very upfront about volunteering information about their products. I really want to test one of these products so I can give you guys some better insight with regards to the quality of these lights.
http://www.eshinesystems.com/grow/3g...row-light.html - Is switchable from Blue/red, might fit your budget!