Hi , i had some thoughts about 250 or 400 watts.
i decided to take the 400 . it sure produce a lot of extra heat.
but i tried to take some preventing steps to avoid the extra heating:
- the air is coming from the freezing shelf in the refrigerator.
- 3 small vent's on the bulb
- the height of the bulb is modularise, i can lift it.
but for now it is o.k plants are growing good . temp at day time 23-25C and at night it is 15 C.
i am a bit afraid from the hot summer in Israel! so in the worst case i can use the 400 watts ignition system to light 250 Wat bulb.
Does anyone have experience with 400 bulb, or 250 watts?
Liraz