Poor Quality Day/Night Sensor Globes

For several years I have been using Eurolux Day/Night Sensor Globes. Over the past 12 months, in particular, I have noted that the globes do not last as long as they should - I have three outside lights using these globes, and have needed to replace globes about five times this year already. At the rate of approximately R60 per globe, this is working out to be quite an expensive \luxury"and the performance of the globes is not in line with the specifications. As a person living alone"