Are lamp photometrics the same?

[Senselessticker]

Are the photometrics of "let's say" a PAR 36 Sealed Beam 9 Watt Halogen going to be roughly the same regardless of the manufacturer?

I need to have calculations to show that NFPA 101 is being met. I've been using photometric files downloaded from specific suppliers. It seems that each supplier has their own photometrics specific to a particular catalog number. Can I assume as stated above that the calculations will return the same results regardless of who makes the lamp?

 

[hbendillo]

The photometrics should be very close for compatible lamps between manufacturers. Are you just looking at a lamp or is it being used in a light fixture? If you are using the same light fixture but different compatible lamps from manufacturers then no problem. However, if you are comparing similar light fixtures using the same type of lamp look a little closer. There could be enough difference in the light fixtures to effect the results.

 

[Senselessticker]

hbendillo,

Thank you for your reply. The partiular lamps I've been using are not mounted in a fixture, but rather as wall mounted emergency units. I'm trying to find the most cost effective way to meet code. It appears to me that most emergency lighting vendors want to sell you a unit that has a low wattage lamp mounted on it and tell you to buy more units. Well, my calcs indicate that I can simply use less units with higher watt lamp to meet code (common sense). Of course I've run the calcs with carefull placment and aiming of the lamps. I'm using Lite-Pro AND Luxicon software to do the calcs and they are consistant with one another. My main question (which I believe you answered), is, for instance: Is a 10 Watt PAR 36 Sealed Beam lamp VERY consistant in photometrics, regardless of the manufacturer? Thanks

 

[sdmays]

Have you ever considered fluorescent emergency lighting? There are emergency ballasts for practically every conceivable fluorescent lamp available for installation in a number of different locations. With an emergency ballast, you probably won't have to mount anything in any wall.

 

[Senselessticker]

I've been trying very hard to convince my client to use ballast. But no, I must use wall packs.

 

[advidana]

You are getting mixed Up with Lamp Data. What is important is light fixture are listed to comply with what they test thier light fixtures under different conditions. Alway use the Emergency Light Manufacture data and recommended lamps or you are not doing your job for your client and the people that will need this emergency light.