Lighting Question....

(Sorry if this has been brought up before but...)

Has anyone ever tried using those high wattage halogen bulbs?
They are very inexpensive...

Other than dealing with the extra heat, are there other disadvantages?

Will these work for a reef?

http://www.homedepot.com/prel80/HDUS...?CNTTYPE=PROD_
META&CNTKEY=misc%2fsearchResults.jsp&BV_SessionID= @
& MID=9876&frmSearchStr=500%
20Watt

same product but this is the mfg's page...

http://www.cooperlighting.com/search...nd=regent&app=
Floodlighting&lightsource=Halogen

TIA

~Mort