shorter lamps vs longer lamps

JAS · 07-08-2003, 11:46 AM

I have been told that if you take the same bed without facials, and make it with facial lamps, requiring a shorter low pressure lamp to fit - the shorter lamp will have a higher meter reading than the original longer one. Why is this (one for Don).

JOHN @ URI · 07-08-2003, 03:41 PM

No, It most likely will read either lower or be very similar.

The UV meter that is most used in the tanning industry reads Total UV output. So a 80w lamp of similar properties to a 100w lamp will most likely read lower.

JAS · 07-08-2003, 04:00 PM

What if it is a 100 watt lamp, just a few inches shorter? Are all shortened lamps 80 watt?

JOHN @ URI · 07-09-2003, 08:41 AM

Here are the standard lamp sizes & wattages.

F59/HO 80 Watt
F59/VHO 140 Watt
F71,F72,F73/HO 100 Watt
F71,F72,F73/VHO 160 Watt
F79/HO 120 Watt
F79/VHO 180 Watt

When lamp sizes are measured the size usually includes the measurement from end of socket to end of socket.

If you measure an actual F71" lamp it is about 68 3/4" long. Add the sockets & you get 71".

engfant · 07-09-2003, 09:37 PM

Watts means nothing in terms of output. It only tells you how much power (and Heat) the bulb will use and give off. A shorter bulb will require less watts to run but give the same results.

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07-08-2003, 11:46 AM	#1 (permalink)
JAS Join Date: Oct 18 2002 Location: Central Indiana Posts: 26 Rep Power: 0	I have been told that if you take the same bed without facials, and make it with facial lamps, requiring a shorter low pressure lamp to fit - the shorter lamp will have a higher meter reading than the original longer one. Why is this (one for Don).

07-08-2003, 03:41 PM	#2 (permalink)
JOHN @ URI I love Derf!! Join Date: Dec 21 2001 Location: Cleveland, Ohio Posts: 1,302 Rep Power: 7	No, It most likely will read either lower or be very similar. The UV meter that is most used in the tanning industry reads Total UV output. So a 80w lamp of similar properties to a 100w lamp will most likely read lower.

07-08-2003, 04:00 PM	#3 (permalink)
JAS Join Date: Oct 18 2002 Location: Central Indiana Posts: 26 Rep Power: 0	What if it is a 100 watt lamp, just a few inches shorter? Are all shortened lamps 80 watt?

07-09-2003, 08:41 AM	#4 (permalink)
JOHN @ URI I love Derf!! Join Date: Dec 21 2001 Location: Cleveland, Ohio Posts: 1,302 Rep Power: 7	Here are the standard lamp sizes & wattages. F59/HO 80 Watt F59/VHO 140 Watt F71,F72,F73/HO 100 Watt F71,F72,F73/VHO 160 Watt F79/HO 120 Watt F79/VHO 180 Watt When lamp sizes are measured the size usually includes the measurement from end of socket to end of socket. If you measure an actual F71" lamp it is about 68 3/4" long. Add the sockets & you get 71".

07-09-2003, 09:37 PM	#5 (permalink)
engfant FREE ENGFANTUCATION Join Date: May 20 2003 Posts: 8,957 Rep Power: 12	Watts means nothing in terms of output. It only tells you how much power (and Heat) the bulb will use and give off. A shorter bulb will require less watts to run but give the same results.

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