The subject comes up from time to time. Try more like 80 ohms. I just don't understand why anyone wants to use semi-exotic lithium cells for that kind of lamp though, instead of D cells which have 10 times the energy for less cost.
For me it would be a shelf life thing. Put it on the shelf and forget it. Maybe 2 or 3 or more years down the road you need the emergency light and you can rest assured it will fire up.