You my want to check the bulb you used - there may be one with a tighter beem.
The following ANSI standard codes are used to designate certain power and beam angle combinations for MR16 lamps. Many manufacturers use these standard codes for lamps matching these specifications:
ESX: 20 watt, 10 degree beam (20MR16/10°)
BAB: 20 watt, 35 degree beam (20MR16/35°)
EXT: 50 watt, 15 degree beam (50MR16/15°)
EXZ: 50 watt, 25 degree beam (50MR16/25°)
EXN: 50 watt, 40 degree beam (50MR16/40°)
FNV: 50 watt, 60 degree beam (50MR16/60°)
FPA: 65 watt, 15 degree beam (65MR16/15°)
FPC: 65 watt, 25 degree beam (65MR16/25°)
FPB: 65 watt, 40 degree beam (65MR16/40°)
EYF: 75 watt, 15 degree beam (75MR16/15°)
EYJ: 75 watt, 25 degree beam (75MR16/25°)
EYC: 75 watt, 40 degree beam (75MR16/40°)
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