"It does reduce the intensity of the light though.The clear ones are better."

"Phosphor coated lamps, offer more of a diffused light and have a lower color temperature"

"The difference between the two is the clear bulbs have a higher intensity than the phosphor coated bulbs which makes them better for vegetative growth. The phosphor coated bulbs are preferred as an "all-rounder" bulb. The phosphor coated bulbs give off a spectrum of higher yellow, orange and red, which makes them useful for improving flowering and increasing vegetative growth."
Marc Benson Reviewed by Marc Benson on . q on metal hallide i have been using an 1000w hps for a couple of years.my first MH just arrived but i may have orderd the wrong one.it is coated not clear,i can exchange it no problem, just wondering if it matters coated or clear. thx for any responce. Rating: 5