View attachment 413865
These are about right for normal DL-1 use ... at least to my eye. I never had a working DL-1 with a Nikon provided bulb so I'm not too sure what "bright enough" is supposed to be. I will say that if you insert a 3V button battery in the DL-1's battery compartment, you will get a noticeably brighter light, though it might come at the expense of bulb life since you are over-voltaging the bulb.
The $5 selling cost is for a single bulb. Every bulb after the 1st one is an additional $3 in case you want "backups".
Price is net to me, and like I said, US destinations only.
Thanks.