I hear 24 v bulbs are 3 X cost of 12 v ?? This will be painful for our clients on service calls. They will freak. I need more info on this. A 20 fixture service to replace 20 bulbs would be very costly just for the bulbs. What would we charge, 30 bucks per mr 16? And then give them a free replacement if it fails prematurely? Lord knows the bulb manu's won't back bulbs with warranties. I noticed in irrigation repairs that the prices for connectors, slip-fixes, pvc, drip lines, funny pipe, rotors, spray heads, and everything, literally, is dirt cheap. The profit margin for the call is very good, and it should be, for the time and digging effort. 24 v is in the right direction to significantly reduce a lot of expensive copper wire, but not if the bulbs go up proportionately. I hear the bulbs are not better or longer- lasting to compensate for price. ??