Im planning for my future tank which would be a 30x30x21 (90 gallon square) and the light source i plan to use is a metal halide unit (250watts of hqi double sided with x2 65watt compact fluorescent lighting) and 4 leds
I will be mainly aquascaping some HC or glosso
I know nothing about metal halide bulbs and how they work i just know they can get hot.
ive read the following article which states that they only lose 20-30% of intensity but i dont mind that...250 watts would become a 200ish watt bulb then ^^.
I dont wana read more articles i just wanted personal inputs on this topic.
i understand rex grigg believes that a bulb will grow plants as long as it lights up (aka no need to change it every 6-12 months)
and im strongly for that ^^
my question are:
whats the life span on these bulbs (as in until they blow or go out not until i should replace them due to wattage/spectrum loss)?
if i use a 10,000k bulb, and it loses spectrum over time....doesnt that just means it becomes a 9000k? or 8000k? etc.?