ipower grow lights

Hey guy, so I woke up this morning and my usually very orange looking hps looks like a mh. Im picking up a new bulb today but id like to know if anyone has experianced this problem with the ipower 600w super hps, the bulb has only been running for about 1800 hours total.

I was at a pawn shop and stumbled across a growlight with reflector, digital balast, fixture and 6500k full spec. MH 600watt. This thing scares the shit outta me. At first it was making this holow matalic clank, but once the lamp warmed up it smeed to just do its thing. just the fan on the...