Zoo Med Laboratories AZMHLB25 25-Watt Highlights Incandescent Bulb, Blue Ideal for small aquariums Available in five colors Available in a variety of colors Zoo Med Laboratories Highlights Incandescent Bulb Zoo Meds Highlights Incandescent Aquarium Bulbs are a new addition to our aquatic line of products The bulbs are gel coated with color, rather than paint, so the color will not chip or wear off The bulbs are gel coated with color, rather than paint, so the color will not chip or wear off