What can i say.Apparenly,this was an exam question.There was no more information given in the question. I guess one of those options must be acceptable or it would'nt have been asked that way. Anyway,i'm not going to lose sleep over it. Thanks all.
Ok,this is what it comes down to. I have been told that one of these four lamps will give out the same light as the ELV ; a 60w tungsten; 100w halogen; 100w BC or 150w PAR. I have'nt a clue ?.......
Or put another way, would the LIGHT OUTPUT of any other type of light bulb,of a higher wattage (230v),be similar,or the same as,a 50w dichroic Extra Low Voltage?