Ho lights
 

I don't know where else to post this so I put it here.
The question is I have a couple of ballasts and lights which I think are HO. How can I tell?
Here is the number off the lights
F72T12/D/HO 85 WATTS ALTO COLLECTION BY PHILIPS.The bulbs are 6' long.
Thanks in advance for the help.

Philips does have a web site that is quite helpfull with all thier products. I have gone there in the past to look at different bulbs

Re: Ho lights
 

In that part # the HO at the end stands for High output

So what you have are HO's


Robert

I thought so, but wanted to check.
Thank you

Just to help anybody reading off bulbs...
The F number is the bulb length in inches. F72 = 72" = 6'.
The T number is how many eights in diameter the bulb is. T12 = 12/8 = 1.5" through. That's part of the appeal of T5s - the smaller profile.
The D I'm not actually sure of.. I think it has to do with some standard in bulb starting/firing?
NO/HO isn't something you see all that often, at least on NO bulbs, but it's pretty obvious.

And even without the HO there, go by standards. A 48" tube that is normal output is rated at 40W (there are T8 energy savers that are a little lower, but never mind them). I always multiply off that rather than memorize the different figures. A 6' NO bulb would be "around" 60W (they're actually 55W standard I think). If the bulb number is higher, you can be sure it's HO or VHO.

the "D" in philips stands for "daylight" as in the color temp of the bulb. so I would guess that one is between 5200K and 6400K depending on which daylight standard they are using. also T12's come in 40 watt and 32 watt energy savers. in the NO flavor.

Steve