Compare Quick view HAYWARD ASTROLITE HAYWARD ASTROLITE | BULB, 120V 400W SPHERICAL FLD | SPX503Z5 MSRP: Was: Now: $36.57 HAYWARD ASTROLITE | BULB, 120V 400W SPHERICAL FLD | SPX503Z5 *** We do not accept returns on bulbs. Please make sure it is the correct part before ordering.