Lamp Questions

What does "PAR" stand for?

"Parabolic Aluminized Reflector"

What is the difference between a PAR 20 and a PAR 16?

All Par numbers are a measure of the lamp diameter in 1/8" increments . PAR 16=2.0", PAR 20=2.5", PAR30=3.75", PAR46=5.75", PAR56=7.0", PAR64=8.0"

What is the difference between an HMI and an MSR?

HMI and MSR are manufacturerer names that have become industry standard. Both lamps are metal halide discharge lamps, MSR just means "medium source rare earth".

What is the difference between the 800hr & 2000 hr par 64's?

The difference between the 800hr and a S/B 2000 PAR 64 is:
cost, color temperature, candle power, beam angle, lumens, and there is no VNSP, very narrow spot, available in the S/B 2000.

What is the difference between the 300hr & 2000hr HPL575 lamp for ETC fixtures?

The 300hr lamp is 575W @ 115V, burning at 3,250 degrees Kelvin with 16,520 initial lumens. The 2,000hr lamp is 575W @ 115V and burns at 3,050 degrees Kelvin with 12,360 initial lumens.

Why do my HPL lamps seem to go ka-pow after about the third time I switch them on on a hot circuit, or after I leave them on for 3 or 4 days?

Because you are probably using the 115v HPL in a constant / full voltage situation, and you need to use the 120v HPL for that. Save your 115v HPL lamps for the stage.

Does a PAR 20 use the same lamp as a PAR 16?

No. The PAR 20 takes an E26 or E27 medium screw base. TMB PAR 16's use an E17 intermediate screw base.

Is there a difference between an E26 and an E27 type lamp base?

Although E26 and E27 base lamps are commonly used interchangeably in the field, there are subtle differences:

  1. Lamps with E26 bases can be UL/ETL Listed in the US and Canada.  E27 cannot be Listed.
  2. E27 bases are rated for up to 220V; E26 bases for up to 120V.
  3. The E27 base is 27mm in diameter; the E26 is 26mm. 
  4. The E27 screw base is about 1 mm longer than the E26 base and will not entirely seat in an E26 socket.
  5. An E26 may not always fit 100% properly in an E27 socket and vice versa.




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