Parts List:

(1) 50 amp/hour (min) Deep Cycle Battery (not dual purpose ) $75
(1) 2 Amp AC Float Charger $25
(1) 12 Volt DC Timer $45 (check load capacity in amps. 2 amp min)
(1) 12 Volt DC Fluorescent Light (18"/15 watt/1.5 amp max) $25

(1 or more) AC Digital Timer(s) for all your other lights and equipment $20/ea

Give or take a few bucks...

A deep cycle battery can be discharged down to at least 20% of it's amp/hour rating. An 50 amp/hour rated battery can provide about 40 amps for an hour or 1 amp for 40 hours.

A 1.5 amp fluorescent light would operate for about 26 hours off of this battery.

If your power outage continues, recharge the battery elsewhere.

The float charger is always on. Keeps battery charged

The light runs everytime your main lights run.

i suggest to have the backup light come on one minute before your main lights and go off one minute after your main lights. with this approach your lighting backup and recovery will be automatic and seamless. Digital timers have battery backups to retain your program settings

This ensures that the light cycle never increases in length during flowering in the event of an act of god. (or whatever you look to). which, in my opinion, substantially reduces yield.

Charger>Battery>Timer>Light

Peace of mind...

Peace out...

urg
urglik Reviewed by urglik on . Low Cost Backup Lighting Parts List: (1) 50 amp/hour (min) Deep Cycle Battery (not dual purpose ) $75 (1) 2 Amp AC Float Charger $25 (1) 12 Volt DC Timer $45 (check load capacity in amps. 2 amp min) (1) 12 Volt DC Fluorescent Light (18"/15 watt/1.5 amp max) $25 (1 or more) AC Digital Timer(s) for all your other lights and equipment $20/ea Give or take a few bucks... Rating: 5