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Bulb for an AP safe light

hoganlia

Member
Joined
Jan 25, 2023
Messages
150
Location
Spain
Format
Medium Format
Drats, one of my safe-lights died today and as I use a wet room and a dry room I need two... so... I unscrew my AP light casing and there is a simple 220v 110w bulb inside with no identification. Can someone guide me towards what type of bulb I should get to replace it and perhaps more importantly, what I shouldn't buy.

Many thanks

Joe
 
hoganlia said:
110w
Click to expand...

Sounds rather hefty. Sure it's not 10 or 11W?

Is anything written on the bulb or the base of the bulb? The fitting is likely a standard type. Likely, any similarly-sized (in terms of physical size and power rating) tungsten bulb will be just fine, as long as it fits. You could also substitute an LED light, in which case you may want to keep power down to ca. 1.5W.
 

I didn't have my glasses on. 10w

Thanks for the tips
 
I blew a bulb last week and replaced it with
S11 LED Bulb - 7.5 Watt Equivalent LED Globe Bulb - 27 Lumens SKU: E27-A8-G from Super Bright LED's.
Shipping was fast and so far it's looking good.
I bought the amber and the red version, to my eye the amber is brighter and at 4 feet I haven't seen any fogging, I'll update after I do a 20 minute coin test.
 
I picked up a 15w bulb as a stand in for the wet room as I often work with an Ilford Ciberchrome tank and hand roll... at least I can see what I am doing. My dry room light is fine
 
koraks said:
Not if you use Foma paper.
Also, using an amber LED in a fixture with a red filter is not a good idea.
Click to expand...
As a Foma user thanks for the tip. I have never thought of an amber light but it's good to know.

BTW, do you happen to know what ISO Fomaspeed Variant 312 is?
 
With an incandescent bulb, the Watt rating simply indicates the amount of ELECTRICITY USED, and NOTHING to do with the amount of Light output by the bulb!!!

When substituting an LED, the amount of electricity consumed is about 1/10 what an incandescent bulb would use, and about the same amount of light would be output by the LED. An incancescent bulb of one Wattage rating might output different amounts of light, depending upon brand or model number; and the 1:10 ratio of power might not be always right. Similarly the conversion efficiency of LED bulb is not always the same.
So one needs to be careful that one is not outputting far brighter light from a safelight...the LUMEN rating is what needs to be close, so as to get about 'the same' amount of light.

One 60W incandescent bulb outputs 580 Lumens
another 60W incandescent bult outputs 520 Lumens

One 60 Watt equivalent LED bulb consumes 9 Wattsa and outputs 750 Lumens
another 60 Watt equivalent LED bulb consumes 7 Watts and outputs 810 Lumens
 
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