Oddly enough, I've also seen a disproportionate quantity of 26W fixtures that fail before their time. Problems such as:

- Ballasts burn out within the first 1 month to 1 year
- Lamps burn out within the first 1 month to 1 year

Advance ballast, work horse, etc, seem to all have the same issues.

I've been called out to brand new communities with 40+ of these fixtures, and the failure rate within the first 6 months is right around 15%. This would be unheard of with a twin PL-13 lamp and ballast installation, and in my opinion, is completely unacceptible (although having the business is nice smile )

I think perhaps this is an engineering issue with the lamp. Sensitive to their own heat output? Overly sensitive to vibration?

I would also love some answers on this.