[Racefan]

Yes...the original writer of the above article was referring to inline or can fans. We normally aren't talking about the desk top oscilating model although there are times when we mean those too. Yes when running a sealed air cooled light you need two seperate fans. Some growers try to leave one end of the reflector open and use one fan to suck room air through the reflector and out of the room eliminating one fan but it requires a much bigger fan and more heat is released into the room that way. Unless your fan is rated for high heat it's best to blow air through the reflector but very few of us do it that way and instead suck the super heated air through the fan heating the bearings which causes a faster fan death.