Hardening off Plants

I've got another 2 weeks for my final frost date. What is the best way to harden off Pepper and tomato plants started under high intensity lights?
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wrote:

I started using a metal halide light a few years ago. The light is so strong almost no hardening is needed. Just put the plants out on a partly cloudy day and they should be OK. A reciprocating fan aimed at the plants under the light will help them get used to wind. This year I got a new "blue" halide bulb. The plants are so squat and thick I didn't bother with the fan.
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