Turbo is overdriving the emitter like 2-3x over spec, so nobody knows how long it’ll last. If you do not use turbo a lot it’ll likely last very, very long time. In those lightbulbs the reason for failure usually is overheating. Or power supply failure, which has components only rated for like 5k hours, not 50k they claim on the box…
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That’s 208.33 days non stop. I’m running lights way under an hour a day, but let’s say an hour a day. That’s 13.69 calendar years. 
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Thanks - don’t plan to use turbo much
will check out the batteries link