The Active Eye Digital Light Meter is essential for accurately determining if your plants are receiving what they need for healthy growth and maximum production. Includes a life-time battery, recommendations and a convenient carrying case.
• Measures both HID lamps and sunlight
• Measures up to 40,000 foot-candles
• Convenient hand-held remote sensor
• 3 scales for precise readings
• Lifetime silicon cell
As MH and HPS bulbs age, their intensity drops, lumen output decreases and foot-candle (a measurement of illumination) readings weaken. Bulbs should be replaced every 6 to 12 months, regardless of the number of hours they’re rated for.