Lotus LED Lights LD4R-40K-HO-4R-CPL-BK-15D 4 inch Round Corrosion Resistant Deep Regressed LED Downlight High Output 18W 4000K - 15 Deg. Beam Angle - Polycarbonate Black Trim UPC_045923093388 Glass light guide optimizes light

Glass light guide optimizes light uniformity

Morris Products 59150 Light Meter - A lightweight pocket Reflected Light Meter

Each bulb contains 180 LEDs and gives off a bright 7200 lumen output with Super White 5000K color temperature

Use in new or existing T8 fixtures

Lotus LED Lights LD4R-40K-HO-4R-CPL-BK-15D 4 inch Round Corrosion Resistant Deep Regressed LED Downlight High Output 18W 4000K - 15 Deg. Beam Angle - Polycarbonate Black Trim UPC_045923093388 Glass light guide optimizes light4 inch Round Corrosion Resistant Deep Regressed LED Downlight High Output 18W 4000K 15 Deg. Beam Angle 1650 lm Polycarbonate Black Trim Elegant Design Without Glare CRI 90+ for True Color Rendering 3 1 2 inch Deep Fits in Limited Ceiling Space Type IC Rated Air Tight & Wet Location No Housing Required Armoured Cable & Metal Connectors Open Plenum Rated Fast and Easy To Install Save On Labor 120V Triac Dimmable Driver Inside Connection Box No Junction