The lowest duration that my timers go is 1 minute, rather.
I use the Mistking timers , they have seconds of on time instead of 1 minute increments .
http://www.mistking.com/Digital-Seconds-Timer.html
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Get an ART DNE timer.
For the most part CAP is crap, but at $65 per timer, it fit the budget. In 2 years, in 4 rooms, not a single failure on the timers.cap is crap. ticking time bombs. hopefully you dont have any genetics you dont mind losing when it craps out.
Do not let this post die. I'm learning way to much.
I'm getting 75 to 80 lights on & 65 to 70 lights off .... now that i've got my heater dialed in !!! it took a good 2 weeks of tweeking the settings to get it to stay at a stable temp zone . it got as high as 90 with lights on & as low as 57 one day when i forgot to turn the heater back upI better bump it then haha.
Guys out of curiosity what kind of day/night temps are you giving your plants? I cannot tell you how important it is to keep your room warm day and night. I've had a fair share of screw up because of temps in the past, these days I keep my temps 75-78ON / 69-72OFF at this rate I'm seeing a big difference in my plants. The stretch is slowed down big time, trics arepacking on earlier, bud are forming earlier plus they are fatter. Basically I'm seeing a good improvement overall.