What's the overall budget, what are the fixtures wanted to use - are they
PAR 36 fixtures set on using at the 6v/30w
transformer in perhaps going
halogen? #H4515 lamps have +20% more output than
incandescent ones for a start, but the same lamp life.
If the case of already have the pinspots with transformers, the #H7604 G.E. #43576 if still on the market is just under double the output of the
incandescent #4515 lamp at the same wattage and
voltage.
#4515 G.E. #24673
PAR 36, Incd. VNSP 5°x 5° 30w/6.4v PAR36 c-6
MOL 2.3/4"
Scr.Term Hem. Shielded
Filament, Bulk Pack #24671 55,000 Cand 100hr
#H4515 G.E. #15133
PAR 36, Quartz VNSP 5½° x 4° 30w/6.4v PAR36 c-6
MOL 2.3/4"
Scr.Term Hem. Shielded
Filament, Shatter Risk 67,000 Cand 100hr
#H7604 G.E. #43576
PAR 36, Quartz 7x4° 30w/6.4v PAR36 MOL70mm
Scr. Term Bulk pkg #43577 100,000 Cand 100hr
Beam spread depends on brand for 4515, but for the H7604, it is slightly more oval in beam spread, but look at the
candlepower. Above post based on GE standard and other brands might offer the same lamps similar in mini-lamp standards for a #4515. Not aware of another H7694 brand but possible.
Note above the "Hem Shielded Fiament" note, this could be important in the #H7604 perhaps having one or not. Acts like a
beam projector in
blocking other than the reflected light. Probably has one given the
beam angle, but could be important in becoming a very different lamp than expected.