those pendant systems can be put in a canopy, but as noted they are large and not really meant for that. but you can do it..
i agree with the recommendation for
MH retro.. they are usually MUCH cheaper. if you go
HQI you are going to have to make sure you get the right UV shielding in place so you dont fry the tank. any specific reason why you want DE vs SE bulbs? SE would be just as affective but cheaper.. and easier to acquire and mount in a canopy.. but thats JMHO
